Listing of NCL Functions by Category

Alphabetical listing | Function type listing | Browsable listing

Visualization: Graphics routines Color Object manipulation Workstation	General NCL routines: Array creation, manipulation, query Group creation, query List routines String System Type conversion Variable query, manipulation
Earth Science: Climatology CESM Crop Heat-stress Date Drought Lat/lon functions Metadata/missing values Meteorology Oceanography RIP functions WRF functions	Math and statistics: General applied math Bootstrap Cumulative distribution functions Empirical orthogonal functions ESMF regridding Extreme values Heat stress Interpolation Ngmath routines Random number generators Regridding Singular value decomposition Spherical harmonics Statistics
Input/output: File input/output Printing

Array creators

dim_pad_extend	Extend (i.e., expand, append, pad) an existing array along the 'record dimension' to a user specified size.
dim_pad_modulo	Pad (i.e., expand, append, extend) an existing array such that the size of a specified dimension is a user specified 'modulo' length.
fspan	Creates an array of evenly-spaced floating point numbers.
generate_sample_indices	Generate indices (subscripts) for resampling: with and without replacement.
generate_unique_indices	Generate unique random indices (subscripts).
ispan	Creates an array of equally-spaced integer, long, or int64 values.
nice_mnmxintvl	Calculates "nice" values for endpoints and spacing to be used for creating a series of equally-spaced levels through the data domain.
venn2_difference	Returns the unique element symmetric differences between two arrays.
venn2_intersection	Returns the unique element intersection (ie., common values) between two arrays.
venn2_union	Returns the unique element union of two arrays.

Array manipulators

array_append_record	Attaches [appends] additional records [leftmost dimension] to a previously existing array.
conform	Expands an array or scalar so that it conforms to the shape of the given variable.
conform_dims	Expands an array or scalar so that it conforms to the shape of the given dimension sizes.
crossp3	Compute cross product of multiple vectors of length 3.
dim_gbits	Unpacks bit chunks from the rightmost dimension of the input array.
dim_pad_extend	Extend (i.e., expand, append, pad) an existing array along the 'record dimension' to a user specified size.
dim_pad_modulo	Pad (i.e., expand, append, extend) an existing array such that the size of a specified dimension is a user specified 'modulo' length.
epsZero	Sets all values in input array to zero that are +/- a user supplied epsilon about zero.
get1Dindex_Collapse	Returns a one dimensional array of subscript indices that DO NOT match the values contained in a user specified list.
get1Dindex_Exclude	Returns a one dimensional array of subscript indices that DO NOT match the values contained in a user specified list.
get_bitfield	Unpacks bit fields from an array.
getbitsone	Unpacks one-bit chunks from the input array.
grid2triple	Converts a two-dimensional grid with one-dimensional coordinate variables to an array where each grid value is associated with its coordinates.
ind_resolve	Resolves a single list of indices to their multi-dimensional representation.
mask	Masks a multi-dimensional array against another given a single mask value.
merge_levels_sfc	Merges a multiple level variable with the corresponding surface variable.
ndtooned	Converts a multi-dimensional array to a one-dimensional array.
onedtond	Converts a one-dimensional array to a multi-dimensional array.
reshape	Reshapes a multi-dimensional array to another multi-dimensional array.
reshape_ind	Places values from a smaller one-dimensional array to a larger one-dimensional array, and reshapes it.
rm_single_dims	Removes (squeezes) singleton (degenerate) dimensions from an array while preserving metadata.
sparse_matrix_mult	Multiplies a sparse matrix with a dense matrix.
transpose	Transposes a matrix and copies all attributes and coordinate variables.
where	Performs array assignments based on a conditional array.

Array query

all	Returns True if all the elements of the input evaluate as True.
any	Returns True if any of the values of its input evaluate as True.
closest_val	Finds the index value in a monotonically increasing one-dimensional array closest to a desired value.
count_unique_values	Counts the number of unique values in the given array.
count_unique_values_n	Counts the number of unique values in the given array, across the given dimension.
dim_maxind	Returns the index of the first occurrence of a maximum value within the specified dimension.
dim_minind	Returns the index of the first occurrence of a minimum value within the specified dimension.
dimsizes	Returns the dimension sizes of the input variable.
get_unique_values	Returns the unique values of the given array.
getind_latlon2d	Returns the indices (subscripts) of two-dimensional latitude/longitude arrays closest to a user-specified latitude/longitude coordinate pair.
ind	Returns the indices where the input is True.
ind_nearest_coord	Determine indices of locations closest to a coordinate array.
isconstant	Test if all non-missing elements of an array are identical.
isMonotonic	Check a one dimensional array to see if it is monotonic.
isscalar	Returns True if the given argument is a scalar (rank one and size one).
local_max_1d	Determines the relative maxima for a 1-dimensional array.
local_min_1d	Determines the relative minima for a 1-dimensional array.
maxind	Returns the index of the first occurrence of a maximum value.
minind	Returns the index of the first occurrence of a minimum value.
month_to_annual	Converts monthly values to annual values.
month_to_annual_weighted	Converts monthly values to annual values weighted by the number of days in a month.
monthly_total_to_daily_mean	Convert monthly total values [e.g., precipitation] to "per day" values.
niceLatLon2D	Check two-dimensional map coordinates to see if they have a "nice" structure.
num	Counts the number of True values in the input.
region_ind	Returns the indices (subscripts) of two-dimensional latitude/longitude arrays that span user specified latitude/longitude boundaries.

Bootstrap

bootstrap_correl	Bootstrap estimates of sample cross correlations (ie, Pearson's correlation coefficient) between two variables.
bootstrap_diff	Bootstrap mean differences from two samples.
bootstrap_estimate	Extract the user specified element from the bootstrapped values.
bootstrap_regcoef	Bootstrap estimates of linear regression coefficient.
bootstrap_stat	Bootstrap estimates of a user specified statistic derived from a variable.

CESM

albedo_ccm	Computes albedo via CESM model radiation variables.
angmom_atm	Calculates the atmosphere's relative angular momentum.
band_pass_area_time	Create a time series of area averages; band-pass filter the resulting area-averaged time series and calculate other statistics.
band_pass_area_time_plot	Generate a plot using the output from band_pass_area_time.
band_pass_hovmueller	Create a band-pass filtered time series suitable for a time vs. longitude (Hovmueller) plot.
band_pass_hovmueller_plot	Generate a plot using the output from band_pass_hovmueller.
band_pass_latlon_time	Create band-pass filtered series at each lat/lon grid point.
band_pass_latlon_time_plot	Generate a plot using the output from band_pass_latlon_time.
cz2ccm	Computes geopotential height in hybrid coordinates.
decomposeSymAsym	Decompose a variable which is symmetric about the equator into symmetric and asymmetric parts.
depth_to_pres	Convert ocean depth to pressure.
dpres_hybrid_ccm	Calculates the pressure layer thicknesses of a hybrid coordinate system.
dpres_hybrid_ccm_se	Calculates the pressure layer thickness at each mid-layer hybrid level for the spectral element model.
dpres_plevel	Calculates the pressure layer thicknesses of a constant pressure level coordinate system.
dpres_plevel_Wrap	Calculates the pressure layer thicknesses of a constant pressure level coordinate system.
dz_height	Calculates the height layer thicknesses at each grid point over varying surface terrain.
kf_filter	Extract equatorial waves by filtering in the Wheeler-Kiladis wavenumber-frequency domain.
mixed_layer_depth	Calculates a quantity derived from the Potential Density of significance. (Documentation under construction.)
mjo_cross	Calculate space-time cross spectrum over multiple segments.
mjo_cross_coh2pha	Calculate space-time coherence-squared and phase using the array returned by mjo_cross_segment .
mjo_cross_plot	Plot coherence-squared and phase spectra as returned by mjo_cross.
mjo_cross_segment	Calculate space-time cross spectrum for a single time segment.
mjo_phase_background	Plot background for MJO phase-space diagram.
mjo_space_time_cross	Calculate space-time cross spectrum over multiple segments.
mjo_spectra	Driver to calculate and plot seasonal spectra via segment averaging as defined by the US-CLIVAR MJO diagnostics website.
mjo_spectra_season	Calculates seasonal spectra via segment averaging as defined by the US-CLIVAR MJO diagnostics website.
mjo_wavenum_freq_season	Calculates wavenumber-frequency spectra via seasonal averaging as defined by the US-CLIVAR MJO diagnostics website.
mjo_wavenum_freq_season_plot	Plot wavenumber-frequency spectra as returned by mjo_wavenum_freq_season.
mjo_xcor_lag_ovly	Plot lagged cross-correlations as returned by mjo_xcor_lag_season.
mjo_xcor_lag_ovly_panel	Plot lagged cross-correlations as returned by mjo_xcor_lag_season as panels.
mjo_xcor_lag_season	Calculates lagged correlations between a reference series and gridded data as specified by the US-CLIVAR MJO diagnostics website.
moc_globe_atl	Facilitates calculating the meridional overturning circulation for the globe and Atlantic.
omega_ccm	Calculates omega [vertical pressure velocity] using the model diagnostic method.
omega_ccm_driver	Computes vertical pressure velocity [omega] via model diagnostic code.
pop_remap	Regrids a POP ocean model grid to another grid.
PopLatLon	Regrids a scalar variable on a POP grid to a lat/lon grid or vice-versa.
PopLatLonV	Converts vectors on a POP grid to a lat/lon grid and vice-versa.
potmp_insitu_ocn	Calculate seawater potential temperature at an arbitrary reference pressure given insitu temperature, salinity and depth.
pres_hybrid_ccm	Calculates pressure at the hybrid levels.
pres_hybrid_ccm_se	Calculates pressure at each hybrid level using spectral element grid structure.
pres_hybrid_jra55	Calculates the "full" hybrid pressure levels for models using the Simmons/Burridge formulations (eg: Japanese ReAnalysis).
resolveWavesHayashi	Reorder the complex coefficients returned by cfftf to resolve the progressive and retrogressive waves.
time_reassign	Reassign (replace) a CF-conforming "time" variable by calculating the mid-time values using the "bounds" attribute.
time_reassign_cv2var	Reassign (replace) a CF-conforming "time" coordinate variable associated with a variable by calculating the mid-time values using the "bounds" attribute.
vinth2p	Interpolates CAM (Community Atmosphere Model) hybrid coordinates to pressure coordinates.
vinth2p_ecmwf	Interpolates CESM hybrid coordinates to pressure coordinates but uses an ECMWF formulation to extrapolate values below ground.
vinth2p_ecmwf_nodes	Interpolates CESM hybrid coordinates to pressure coordinates but uses an ECMWF formulation to extrapolate values below ground.
vinth2p_nodes	Interpolates CESM hybrid coordinates to pressure coordinates on an unstructured grid.
vintp2p_ecmwf	Interpolates data at multidimensional pressure levels to constant pressure coordinates and uses an ECMWF formulation to extrapolate values below ground.
wgt_vert_avg_beta	Computes weighted vertical average or sum using pressure thickness and beta factors.
wgt_volave_ccm	Calculates the volume average of a quantity from the CCM using weights.
wgt_volrmse_ccm	Calculates a weighted volume root-mean-square-difference between two variables from the CCM.
wkSpaceTime	Calculates Wheeler-Kiladis space-time spectra.
wkSpaceTime_cam	Calculates Wheeler-Kiladis space-time spectra using a generic CAM interface.

Climatology

calcDayAnomTLL	Calculates daily anomalies from a daily data climatology.
calcMonAnomLLLT	Calculates monthly anomalies by subtracting the long term mean from each point (lev,lat,lon,time version)
calcMonAnomLLT	Calculates monthly anomalies by subtracting the long term mean from each point (lat,lon,time version)
calcMonAnomTLL	Calculates monthly anomalies by subtracting the long term mean from each point (time,lat,lon version)
calcMonAnomTLLL	Calculates monthly anomalies by subtracting the long term mean from each point: (time,lev,lat,lon) version.
clmDayHourTLL	Calculates climatological day-hour means at user specified hours for each day of the year.
clmDayHourTLLL	Calculates climatological day-hour means at user specified hours for each day of the year.
clmDayTLL	Calculates long term daily means (daily climatology) from daily data.
clmDayTLLL	Calculates long term daily means (daily climatology) from daily data.
clmMon2clmDay	Create a daily climatology from a monthly climatology.
clmMonLLLT	Calculates long term monthly means (monthly climatology) from monthly data: (lev,lat,lon,time) version.
clmMonLLT	Calculates long term monthly means (monthly climatology) from monthly data (lat,lon,time version)
clmMonTLL	Calculates long term monthly means (monthly climatology) from monthly data: (time,lat,lon) version
clmMonTLLL	Calculates long term monthly means (monthly climatology) from monthly data: (time,lev,lat,lon) version
month_to_season	Computes a user-specified three-month seasonal mean (DJF, JFM, FMA, MAM, AMJ, MJJ, JJA, JAS, ASO, SON, OND, NDJ).
month_to_season12	Computes three-month seasonal means (DJF, JFM, FMA, MAM, AMJ, MJJ, JJA, JAS, ASO, SON, OND, NDJ).
month_to_seasonN	Computes a user-specified list of three-month seasonal means (DJF, JFM, FMA, MAM, AMJ, MJJ, JJA, JAS, ASO, SON, OND, NDJ).
rmAnnCycle1D	Removes annual cycle from a one-dimensional time series.
rmMonAnnCycLLLT	Removes the annual cycle from "monthly" data.
rmMonAnnCycLLT	Removes the annual cycle from "monthly" data.
rmMonAnnCycTLL	Removes the annual cycle from "monthly" data.
smthClmDayTLL	Calculates a smooth mean daily annual cycle for an array nominally dimensioned (Time,Lat,Lon).
smthClmDayTLLL	Calculates a smooth mean daily annual cycle for an array nominally dimensioned (Time,Level,Lat,Lon).
stdMonLLLT	Calculates standard deviations of monthly means.
stdMonLLT	Calculates standard deviations of monthly means.
stdMonTLL	Calculates standard deviations of monthly means.
stdMonTLLL	Calculates standard deviations of monthly means.

Color routines

color_index_to_rgba	Converts an absolute color index to its equivalent RGBA quadruplet
ColorNegDashZeroPosContour	Sets the negative contours to dashed, and colors the negative, positive, and zero contours to user-specified colors.
ColorShadeLeGeContour	Shades contour regions given low and high values and two colors. (Deprecated. Use gsn_contour_shade.)
draw_color_palette	Draws the given colors or color map as a series of filled boxes.
get_color_rgba	Chooses an RGB triplet or RGBA quadruplet for a scalar value, given a color map and a range of values.
GetFillColor	Chooses a color from a group of RGB triplets based upon a secondary scalar field (deprecated version).
GetFillColorIndex	Chooses from a list of color table indices based upon a secondary scalar field (deprecated version).
gsn_contour_shade	Shades contour regions given low and/or high values using colors or patterns.
gsn_define_colormap	Defines a color map for the given workstation.
gsn_draw_colormap	Draws the current color map for the given workstation.
gsn_draw_named_colors	Draws the given list of named colors.
gsn_merge_colormaps	Merges two color maps and sets this as the color map for the given workstation.
gsn_retrieve_colormap	Retrieves a color map for the given workstation.
gsn_reverse_colormap	Reverses the color map for the given workstation.
hlsrgb	Converts HLS color values to RGB.
hsv2rgb	Maps values from the HSV color model to the RGB color model (deprecated).
hsvrgb	Converts HSV color values to RGB.
namedcolor2rgb	Returns the RGB triplets of the given list of named colors.
namedcolor2rgba	Returns the RGBA quadruplets of the given list of named colors.
NhlFreeColor	Removes one or more color entries from one or more workstations.
NhlGetNamedColorIndex	Returns color map indexes that match the given color names in the color maps of the given workstations.
NhlIsAllocatedColor	Queries a list of workstations to determine whether or not the given color indexes have been allocated.
NhlNewColor	Allocates new workstation color indexes.
NhlPalGetDefined	Returns a list of available color maps.
NhlSetColor	Sets the colors for a given list of color indexes and workstations.
read_colormap_file	Reads an NCL system colormap file or a user-defined colormap.
rgbhls	Converts RGB color values to HLS.
rgbhsv	Converts RGB color values to HSV.
RGBtoCmap	Reads a text file of RGB triplets and converts them to a colormap.
rgbyiq	Converts RGB color values to YIQ values.
setColorContourClear	Sets the color contours between two given levels to transparent.
span_color_indexes	Given the number of desired color values, return an array of indexes that nicely span the given color map.
span_color_rgba	Given the number of desired color values, return an array of RGB triplets or RGBA quadruplets that nicely span the given color map.
span_named_colors	Returns an RGB array that is a span between given list of named colors.
yiqrgb	Converts YIQ color values to RGB.

Crop

actvpr_mnmx_fao56	Compute actual vapor pressure via equation 17 as described in FAO 56.
actvpr_rhmean_fao56	Compute actual vapor pressure via equation 19 as described in FAO 56.
crop_water_need	Compute "crop water need", the quantity of water needed to attain maximum crop productivity.
daylight_fao56	Compute maximum number of daylight hours as described in FAO 56.
netlw_fao56	Compute longwave radiation as described in FAO 56.
netrad_fao56	Compute net radiation as the difference between net shortwave and net longwave radiation.
netsw_fao56	Compute net shortwave radiation as described in FAO 56.
precip_rain_snow	Partition monthly precipitation totals into rain and snow amount using an empirical relationship.
prsatm_tz_fao56	Compute atmospheric pressure as described in FAO 56.
prsatm_z_fao56	Compute atmospheric pressure using the approximation described in FAO 56: Chapter 3; equation 7.
psychro_fao56	Computes the psychrometric constant [kPa/C] as described in FAO 56.
radext_fao56	Compute extraterrestrial radiation for daily periods as described in FAO 56.
radsol2_fao56	Compute solar radiation from daily sunshine and day-of-year as described in FAO 56.
radsol3_hargreaves_fao56	Compute solar radiation derived from air temperature differences using Hargreaves method as described in FAO 56.
radsol_clrsky_fao56	Compute clear sky solar radiation as described in FAO 56.
radsol_fao56	Compute solar radiation via the 'Angstrom Formula' which uses extraterrestrial radiation and relative sunshine as described in FAO 56 (equation 35).
refevt_hamon	Use the Hamon formulation to derive reference evapotranspiration.
refevt_hargreaves_fao56	Use the Hargreaves ETo equation to derive reference evapotranspiration as described in FAO 56.
refevt_penman_fao56	Use the full Penman-Monteith equation to derive reference evapotranspiration as described in FAO 56.
refevt_turc	Use the Turc ETo formulation to derive reference evapotranspiration.
refevt_turc_rh	Use the Turc ETo formulation with a correction for low relative humidity to derive reference evapotranspiration.
rhum_fao56	Compute relative humidity as described in FAO 56.
satvpr_mean_fao56	Compute mean saturation vapor pressure using minimum and maximum temperature temperature as described in FAO 56.
satvpr_slope_fao56	Compute the slope of the saturation vapor pressure curve as described in FAO 56.
satvpr_tdew_fao56	Compute actual saturation vapor pressure as described in FAO 56.
satvpr_temp_fao56	Compute saturation vapor pressure using temperature as described in FAO 56.
soil_heatflux_month_fao56	Compute soil heat flux for monthly periods as described in FAO 56.
tdew_actvpr_fao56	Compute dew point temperature as a function of actual vapor pressure as described in FAO 56.
thornthwaite	Estimate the potential evapotranspiration (PET) via the Thornthwaite method.
u2_fao56	Compute 2-meter wind speed (m/s) as described in FAO 56.

Cumulative distribution functions

cdfbin_p	Calculates the binomial density of a cumulative distribution function.
cdfbin_pr	Calculates the probability of success of each trial of a cumulative distribution function.
cdfbin_s	Calculates the number of successes of a cumulative distribution function.
cdfbin_xn	Calculates the number of binomial trials of a cumulative distribution function.
cdfchi_p	Calculates the integral of a cumulative chi-square distribution function.
cdfchi_x	Calculates the upper limit of integration of a cumulative chi-square distribution function.
cdfgam_p	Calculates the integral of a cumulative gamma distribution function.
cdfgam_x	Calculates the upper limit of integration of a cumulative gamma distribution function.
cdfnor_p	Calculates the integral of a cumulative normal distribution function.
cdfnor_x	Calculates the upper limit of integration of a cumulative normal distribution function.

Date routines

box_percentile_plot	Creates a box percentile plot. Documentation under construction
calendar_decode2	Translates numeric time coordinates to calendar times.
calendar_decode2_fix	Translates numeric time coordinates to calendar times (temporary function; see the 6.4.0 release notes for details).
cd_calendar	Converts a mixed Julian/Gregorian date to a UT-referenced date.
cd_convert	Converts a time variable from one set of units to another.
cd_inv_calendar	Converts a UT-referenced date to a mixed Julian/Gregorian date.
cd_inv_string	Converts string time values to numeric values, using the given format string.
cd_string	Converts time values into nicely formatted strings.
day_of_week	Calculates the day of the week given month, day, and year (Gregorian calendar).
day_of_year	Calculates the day of the year (sometimes erroneously referred to as 'julian day') given Gregorian calendar month, day, and year.
days_in_month	Calculates the number of days in a month given month and year.
greg2jul	Converts Gregorian dates to astronomical Julian days.
grib_stime2itime	Converts grib initial_time (string) to time (integer).
isleapyear	Determines if a given year is a leap year.
jul2greg	Converts an astronomical Julian day to a Gregorian date.
monthday	Calculates a concatenated month_day given a day and year.
time_axis_labels	Sets resources necessary to draw nice tickmark labels using a format of date/time on an axis.
time_reassign	Reassign (replace) a CF-conforming "time" variable by calculating the mid-time values using the "bounds" attribute.
time_reassign_cv2var	Reassign (replace) a CF-conforming "time" coordinate variable associated with a variable by calculating the mid-time values using the "bounds" attribute.
time_to_newtime	Change a "udunits" recognized time unit to a new (different) "udunits" recognized time unit.
time_to_newtime_fix	Change a "udunits" recognized time unit to a new (different) "udunits" recognized time unit (temporary function; see the 6.4.0 release notes for details).
ut_calendar	Converts a mixed Julian/Gregorian date to a UT-referenced date (deprecated; use cd_calendar).
ut_calendar_fix	Converts a mixed Julian/Gregorian date to a UT-referenced date (temporary function; see the 6.4.0 release notes for details).
ut_convert	Converts a time variable from one set of units to another (deprecated; use cd_convert).
ut_convert_fix	Converts a time variable from one set of units to another (temporary function; see the 6.4.0 release notes for details).
ut_inv_calendar	Converts a UT-referenced date to a mixed Julian/Gregorian date (deprecated; use cd_inv_calendar).
ut_inv_calendar_fix	Converts a UT-referenced date to a mixed Julian/Gregorian date (temporary function; see the 6.4.0 release notes for details).
ut_string	Converts time values into nicely formatted strings (deprecated; use cd_string)
ut_string_fix	Converts time values into nicely formatted strings (temporary function; see the 6.4.0 release notes for details).
yyyyddd_to_yyyymmdd	Given concatenated year and day-of-year (yyyyddd) create a one-dimensional array containing concatenated year, month and day-of-month (yyyymmdd) values.
yyyymm_time	Creates a one-dimensional array containing year-month (yyyymm) values.
yyyymm_to_yyyyfrac	Converts a one dimensional array containing yyyymm values to yyyy and fractional year.
yyyymmdd_time	Creates a one-dimensional array containing year-month-day (yyyymmdd) values.
yyyymmdd_to_yyyyddd	Given concatenated year-month-day_of_month (yyyymmdd) create a one-dimensional array containing concatenated year and day_of_year (yyyyddd) values.
yyyymmdd_to_yyyyfrac	Converts a one-dimensional array containing yyyymmdd values to yyyy and fractional year.
yyyymmddhh_time	Creates a one-dimensional array containing year-month-day-hour (yyyymmddhh) values.
yyyymmddhh_to_yyyyfrac	Converts a one-dimensional array containing yyyymmddhh values to yyyy and fractional year.

Drought

dim_acumrun_n	Calculates individual accumulated sums of sequences ('runs') of a specified length.
dim_cumsum_n	Calculates the cumulative sum along the given dimension(s).
dim_cumsum_n_Wrap	Calculates the cumulative sum along the given dimension(s) and retains metadata.
dim_gamfit_n	Fit data to the two parameter gamma distribution.
dim_numrun_n	Counts the number of "runs" (sequences) within a series containing zeros and ones.
dim_spi_n	Calculates the standardized precipitation index (SPI) by fitting a gamma or a Pearson Type III distribution to monthly precipitation values.

Empirical orthogonal functions

eof2data	Reconstructs a data set from EOFs and EOF time series.
eof2data_n	Reconstructs a data set from EOFs and EOF time series, given an index that specifies which dimension contains the time dimemsion.
eof_varimax	Rotates EOFs using the using Kaiser row normalization and the varimax criterion (deprecated version).
eofcor	Calculates empirical orthogonal functions via a correlation matrix (NCL's original function).
eofcor_pcmsg	Calculates empirical orthogonal functions via a correlation matrix (missing values allowed) (deprecated version).
eofcor_ts	Calculates the time series of the amplitudes associated with each eigenvalue in an EOF which was calculated using a correlation matrix.
eofcor_Wrap	Calculates empirical orthogonal functions and retains metadata. (NCL's original function).
eofcov	Calculates empirical orthogonal functions via a covariance matrix (original version).
eofcov_pcmsg	Calculates empirical orthogonal functions via a covariance matrix (missing values allowed)(deprecated version).
eofcov_ts	Calculates the time series of the amplitudes associated with each eigenvalue in an EOF which was calculated using a covariance matrix.
eofcov_Wrap	Calculates empirical orthogonal functions and retains metadata. (NCL's original EOF function).
eofunc	Computes empirical orthogonal functions (EOFs, aka: Principal Component Analysis).
eofunc_n	Computes empirical orthogonal functions (EOFs, aka: Principal Component Analysis), given an index that specifies which dimension contains the number of observations.
eofunc_n_Wrap	Computes empirical orthogonal functions (aka: Principal Component Analysis, Eigen Analysis) given an index that specifies which dimension contains the number of observations, and retains metadata.
eofunc_north	Use North et al (MWR, 1982) equation 24 to evaluate eigenvalue separation.
eofunc_ts	Calculates the time series of the amplitudes associated with each eigenvalue in an EOF.
eofunc_ts_n	Calculates the time series of the amplitudes associated with each eigenvalue in an EOF, given an index that specifies the time dimension.
eofunc_ts_n_Wrap	Calculates the time series of the amplitudes associated with each eigenvalue in an EOF, given an index that specifies the time dimension, and retains metadata.
eofunc_ts_Wrap	Calculates the time series of the amplitudes associated with each eigenvalue in an EOF and retains metadata.
eofunc_varimax	Rotates EOFs using the using Kaiser row normalization and the varimax criterion.
eofunc_varimax_reorder	Reorder the results returned by eof_varimax into descending order by percent variance explained.
eofunc_varimax_Wrap	Rotates EOFs using the using Kaiser row normalization and the varimax criterion and retains metadata.
eofunc_Wrap	Computes empirical orthogonal functions (aka: Principal Component Analysis, Eigen Analysis) and retains metadata.

ESMF

curvilinear_to_SCRIP	Writes the description of a curvilinear grid to a SCRIP file.
ESMF_regrid	Regrids data from one lat/lon grid to another, using ESMF software.
ESMF_regrid_gen_weights	Writes a weight file using the offline ESMF weight generator.
ESMF_regrid_with_weights	Using the provided weight file, regrids data from one lat/lon grid to another.
latlon_to_SCRIP	Writes the description of a lat/lon grid to a SCRIP file.
rectilinear_to_SCRIP	Writes the description of a rectilinear grid to a SCRIP file.
unstructured_to_ESMF	Writes the description of an unstructured grid to an ESMF file.

Extreme values

extval_frechet	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Frechet Type II distribution given the shape, scale and location parameters.
extval_gev	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Generalized Extreme Value (GEV) distribution given the shape, scale and location parameters.
extval_gumbel	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Gumbel (Type I) distribution function given the scale and location parameters.
extval_mlegam	Estimates the location, shape, scale and other parameters for the Gamma distribution using maximum-likelihood estimation (MLE).
extval_mlegev	Estimates the shape, scale and location parameters for the Generalized Extreme-Value (GEV) distribution using Maximum-Likelihood Estimation (MLE).
extval_pareto	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Pareto distributions (Generalized, Type I, TYpe II) given the shape, scale and location parameters.
extval_recurrence_table	Calculates the recurrence interval (return period), cumulative and exceedence probabilities based upon a time series.
extval_return_period	Calculates the period of an event (eg, flood, heat wave, drought) occurring given an average event recurrence interval and specified probability level.
extval_return_prob	Calculates the probability of an event (eg, flood, heat wave, drought) given an average event interval and a specified exceedance period.
extval_weibull	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Weibull Type III distribution given the shape, scale and location parameters.

File I/O

addfile	Opens a data file that is (or is to be) written in a supported file format.
addfiles	Creates a reference that spans multiple data files.
addfiles_GetVar	Creates a reference that spans multiple data files and returns metadata. (deprecated: see addfiles)
asciiread	Reads a file that contains ASCII representations of basic data types.
asciiwrite	Creates an ascii text file of numeric or string data type.
cbinread	Reads binary files created using the C block I/O function write.
cbinwrite	Creates a binary file in raw C block I/O format for a numeric data type.
craybinnumrec	Returns the number of unformatted sequential access Fortran records in a Cray COS blocked binary file.
craybinrecread	Reads COS blocked unformatted sequential access Fortran binary files.
fbindirread	Reads binary records written by a Fortran direct access write or C write.
fbindirSwap	Reads byte-reversed data and writes output file that can be read by fbindirread or cbinread (deprecated).
fbindirwrite	Writes binary records to a file in manner analogous to fortran's "access=direct".
fbinnumrec	Returns the number of unformatted sequential Fortran records in a binary file.
fbinread	Reads one binary record that has been written using an UNFORMATTED FORTRAN write.
fbinrecread	Reads unformatted sequential access Fortran binary files.
fbinrecwrite	Writes a single unformatted sequential access Fortran record to a file.
fbinseqSwap1	Byte swaps Fortran sequential files (deprecated).
fbinseqSwap2	Byte swaps Fortran sequential files (more memory friendly) (deprecated).
fbinwrite	Writes a single binary record to a file in manner analogous to Fortran's "form=unformatted, access=sequential".
fileattdef	Defines global (file) attributes associated with a supported file.
filechunkdimdef	Defines chunking dimension names, dimension sizes, unlimited dimensions on a supported file.
filedimdef	Defines dimension names, dimension sizes, unlimited dimensions on a supported file.
fileexists	Checks for existence of any UNIX file.
filegrpdef	Defines a list of group (names), for a supported file, or group.
filevarattdef	Copies attributes from an input variable to one or more variables on a supported file.
filevarchunkdef	Defines a list of variable names, variable var_types, and variable dimension names for a supported file.
filevarcompressleveldef	Defines a list of variable names, variable var_types, and variable dimension names for a supported file.
filevardef	Defines a list of variable names, variable types, and variable dimension names for a supported file.
filevardimsizes	Returns the dimension sizes of a variable on the given file (deprecated; use getfilevardimsizes).
getfileatts	Returns a list of attribute names on the given file.
getfiledimnames	Returns a list of dimension names for the given file.
getfiledims	Returns a list of dimension names for the given file.
getfiledimsizes	Returns an array of dimension sizes on the given file.
getfilegrpnames	Returns an array of file group names on the given file.
getfilepath	Returns a string of the opened file's path.
getfilevaratts	Returns all attribute names associated with a variable on the given file.
getfilevarchunkdimsizes	Returns the chunk dimension sizes of variable on a given file which has chunk dimensions.
getfilevardimnames	Returns all dimension names associated with a variable on the given file.
getfilevardims	Returns all dimension names associated with a variable on the given file.
getfilevardimsizes	Returns the dimension sizes of a variable on a given file.
getfilevarnames	Returns an array of file variable names on the given file.
getfilevartypes	Returns the types of the named variables stored in the given file.
isfile	Returns True if input is of type file.
isfilepresent	Checks if a supported file exists.
isfilevar	Checks if specified file variables are defined in a file.
isfilevaratt	Checks if specified file variable attributes are defined for a file variable.
isfilevarcoord	Checks if a coordinate variable is defined in a file.
isfilevardim	Checks if file variable dimensions are defined for a file variable.
keyword_values	Read a text file that contains keywords and one-or-more values (similar to fortran NAMELIST).
list_files	Lists all of the variables that reference files.
list_filevars	Lists all of the variables associated with a specific file.
numAsciiCol	Returns the number of columns in an ASCII file.
numAsciiRow	Returns the number of rows in an ASCII file.
readAsciiHead	Reads an ASCII file and returns just the header.
readAsciiTable	Reads an ASCII file given the number of lines at the beginning and end of the file to ignore.
setfileoption	Sets a number of file-format-specific options.
v5d_close	Closes a Vis5D+ format file.
v5d_create	Creates a Vis5D+ format file.
v5d_setLowLev	Sets the lowest vertical offset, in grid level, for each 3-dimensional gridded variable in a Vis5D+ format file.
v5d_setUnits	Sets a name for physical units for a variable in a Vis5D+ format file.
v5d_write	Writes compressed data to a Vis5D+ format file.
v5d_write_var	Writes a single 3-dimensional gridded variable to a Vis5D+ format file.
wrf_user_getvar	Extracts data from ARW WRF model output, and does basic diagnostics calculations.
wrf_user_list_times	Extracts the list of available times in the ARW WRF model output.
wrf_wps_close_int	Closes a currently open WPS intermediate file.
wrf_wps_open_int	Opens a WPS intermediate file and returns a status.
wrf_wps_rddata_int	Reads a 2D field from an open WPS intermediate file.
wrf_wps_rdhead_int	Reads header information for the current field of an open WPS intermediate file.
wrf_wps_read_int	Reads data from a WPS intermediate file.
wrf_wps_write_int	Writes data to a WPS intermediate file.
write_matrix	Writes nicely-formatted integer, float, or double precision two-dimensional (2D) arrays to standard out or to a file.
write_table	Writes formatted elements from a list to an ASCII file.

General applied math

abs	Returns the absolute value of numeric data.
acos	Computes the inverse cosine of numeric types.
asin	Computes the inverse sine of numeric types.
atan	Computes the inverse tangent of numeric types.
atan2	Computes the inverse tangent of (y/x) for numeric types.
avg	Computes the average of a variable regardless of dimensionality.
betainc	Evaluates the incomplete beta function.
bw_bandpass_filter	Applies a Butterworth bandpass filter optimized for narrow bandwidths to time series.
calculate_daily_values	Calculate daily values [avg, sum, min, max] from high frequency temporal values.
calculate_monthly_values	Calculate monthly values [avg, sum, min, max] from high frequency temporal values.
calculate_segment_values	Calculate segment (eg, pentad [5-day], weekly [7-day]) values from high frequency temporal values.
cancor	Performs canonical correlation analysis between two sets of variables.
cdft_p	Calculates the one-sided probability given a t-value and the degrees of freedom.
cdft_t	Calculates the t-value given the one-sided probability and the degrees of freedom.
ceemdan	Complete Ensemble Empirical Mode Decomposition with Adaptive Noise.
ceil	Returns the smallest integral value greater than or equal to each input value.
center_finite_diff	Performs a centered finite difference operation on the rightmost dimension.
center_finite_diff_n	Performs a centered finite difference operation on the given dimension.
cfftb	Performs a backward complex discrete fourier transform [Fourier Synthesis].
cfftf	Performs a forward complex discrete fourier transform of a real periodic sequence.
cfftf_frq_reorder	Reorders the data returned by cfftf.
chiinv	Evaluates the inverse chi-squared distribution function.
cohsq_c2p	Given coherence-squared and the effective degrees-of-freedom, calculate the associated probability.
cohsq_p2c	Calculate the value(s) of coherence-squared required for a specified significance level and effectiove degrees-of-freedom.
cos	Computes the cosine of numeric types.
cosh	Computes the hyperbolic cosine of numeric types.
covcorm	Calculates a covariance or correlation matrix.
covcorm_xy	Calculates a covariance or correlation matrix given two separate 'n x m' arrays.
cumsum	Calculates the cumulative sum.
decimalPlaces	Truncates or rounds to the number of decimal places specified.
demod_cmplx	Perform a complex demodulation on a time series.
determinant	Calculate the determinant of a small square real matrix using a partial-pivoting Gaussian elimination scheme.
dim_acumrun_n	Calculates individual accumulated sums of sequences ('runs') of a specified length.
dim_avg	Computes the average of a variable's rightmost dimension at all other dimensions.
dim_avg_n	Computes the average of a variable's given dimension(s) at all other dimensions.
dim_avg_n_Wrap	Computes the average of a variable's given dimensions at all other dimensions and retains metadata.
dim_avg_wgt	Computes the weighted average of a variable's rightmost dimension at all other dimensions.
dim_avg_wgt_n	Computes the weighted average of a variable's given dimension at all other dimensions.
dim_avg_wgt_n_Wrap	Computes the weighted average of a variable's given dimension at all other dimensions and retains metadata.
dim_avg_wgt_Wrap	Computes the weighted average of a variable's rightmost dimension at all other dimensions and retains metadata.
dim_avg_Wrap	Computes the average of a variable's rightmost dimension at all other dimensions and retains metadata.
dim_cumsum	Calculates the cumulative sum along the rightmost dimension.
dim_cumsum_n	Calculates the cumulative sum along the given dimension(s).
dim_cumsum_n_Wrap	Calculates the cumulative sum along the given dimension(s) and retains metadata.
dim_cumsum_Wrap	Calculates the cumulative sum along the rightmost dimension and retains metadata.
dim_max	Finds the maximum of a variable's rightmost dimension at all other dimensions.
dim_max_n	Finds the maximum of a variable's given dimensions at all other dimensions.
dim_max_n_Wrap	Computes the maximum of a variable's given dimensions at all other dimensions and retains metadata.
dim_median	Computes the median of a variable's rightmost dimension at all other dimensions.
dim_median_n	Computes the median of a variable's given dimensions at all other dimensions.
dim_min	Finds the minimum of a variable's rightmost dimension at all other dimensions.
dim_min_n	Finds the minimum of a variable's given dimensions at all other dimensions.
dim_min_n_Wrap	Computes the minimum of a variable's given dimensions at all other dimensions and retains metadata.
dim_num	Calculates the number of True values of a variable's rightmost dimension at all other dimensions.
dim_num_n	Calculates the number of True values of a variable's given dimensions at all other dimensions.
dim_numrun_n	Counts the number of "runs" (sequences) within a series containing zeros and ones.
dim_pqsort	Computes the permutation vector generated by sorting the n - 1th (rightmost) dimension.
dim_pqsort_n	Computes the permutation vector generated by sorting the given dimension.
dim_product	Computes the product of a variable's rightmost dimension at all other dimensions.
dim_product_n	Computes the product of a variable's given dimension(s) at all other dimensions.
dim_rmsd	Computes the root-mean-square-difference between two variables' rightmost dimension at all other dimensions.
dim_rmsd_n	Computes the root-mean-square-difference between two variables' given dimensions at all other dimensions.
dim_rmsd_n_Wrap	Computes the root-mean-square-difference between two variables' given dimensions at all other dimensions.
dim_rmsd_Wrap	Computes the root-mean-square-difference between two variables' rightmost dimension at all other dimensions.
dim_rmvmean	Calculates and removes the mean of the (rightmost) dimension at all other dimensions.
dim_rmvmean_n	Calculates and removes the mean of the given dimension(s) at all other dimensions.
dim_rmvmean_n_Wrap	Calculates and removes the mean of the given dimensions at all other dimensions and retains metadata.
dim_rmvmean_Wrap	Calculates and removes the mean of the (rightmost) dimension at all other dimensions and retains metadata.
dim_rmvmed	Calculates and removes the median of the (rightmost) dimension at all other dimensions.
dim_rmvmed_n	Calculates and removes the median of the given dimension(s) at all other dimensions.
dim_rmvmed_n_Wrap	Calculates and removes the median of the given dimensions at all other dimensions and retains metadata.
dim_rmvmed_Wrap	Calculates and removes the median of the (rightmost) dimension at all other dimensions and retains metadata.
dim_standardize	Calculates standardized anomalies of the rightmost dimension at all other dimensions.
dim_standardize_n	Calculates standardized anomalies of the given dimension(s) at all other dimensions.
dim_standardize_n_Wrap	Calculates standardized anomalies of the given dimensions at all other dimensions and retains metadata.
dim_standardize_Wrap	Calculates standardized anomalies of the rightmost dimension at all other dimensions and retains metadata.
dim_stat4	Computes the first four moments (average, sample variance, skewness, and kurtosis) of the rightmost dimension for all other dimensions.
dim_stat4_n	Computes the first four moments (average, sample variance, skewness, and kurtosis) of the given dimension(s) for all other dimensions.
dim_stddev	Computes the sample standard deviation of a variable's rightmost dimension at all other dimensions.
dim_stddev_n	Computes the sample standard deviation of a variable's given dimension(s) at all other dimensions.
dim_stddev_n_Wrap	Computes the sample standard deviation of a variable's given dimension(s) at all other dimensions and retains metadata.
dim_stddev_Wrap	Computes the sample standard deviation of a variable's rightmost dimension at all other dimensions and retains metadata.
dim_sum	Computes the arithmetic sum of a variable's rightmost dimension at all other dimensions.
dim_sum_n	Computes the arithmetic sum of a variable's given dimension(s) at all other dimensions.
dim_sum_n_Wrap	Computes the arithmetic sum of a variable's given dimensions at all other dimensions and retains metadata.
dim_sum_wgt	Computes the weighted sum of a variable's rightmost dimension at all other dimensions.
dim_sum_wgt_n	Computes the weighted sum of a variable's given dimension at all other dimensions.
dim_sum_wgt_n_Wrap	Computes the weighted sum of a variable's given dimension at all other dimensions and retains metadata.
dim_sum_wgt_Wrap	Computes the weighted sum of a variable's rightmost dimension at all other dimensions and retains metadata.
dim_sum_Wrap	Computes the arithmetic sum of a variable's rightmost dimension at all other dimensions and retains metadata.
dim_variance	Computes the unbiased estimates of the variance of a variable's rightmost dimension.
dim_variance_n	Computes the unbiased estimates of the variance of a variable's given dimension(s) at all other dimensions.
dim_variance_n_Wrap	Computes unbiased estimates of the variance of a variable's given dimension(s) at all other dimensions and retains metadata.
dim_variance_Wrap	Computes unbiased estimates of the variance of a variable's rightmost dimension at all other dimensions and retains metadata.
dtrend	Estimates and removes the least squares linear trend of the rightmost dimension from all grid points.
dtrend_leftdim	Estimates and removes the least squares linear trend of the leftmost dimension from all grid points and retains metadata.
dtrend_msg	Estimates and removes the least squares linear trend of the rightmost dimension from all grid points (missing values allowed).
dtrend_msg_n	Estimates and removes the least squares linear trend of the dim-th dimension from all grid points (missing values allowed).
dtrend_n	Estimates and removes the least squares linear trend of the given dimension from all grid points.
dtrend_quadratic	Estimates and removes the least squares quadratic trend of the rightmost dimension from all grid points.
dtrend_quadratic_msg_n	Estimates and removes the least squares quadratic trend of the dim-th dimension from all grid points (missing values allowed).
eemd	Perform ensemble empirical mode decomposition (EEMD).
equiv_sample_size	Estimates the number of independent values in a series of correlated values.
erf	Evaluates the real error function.
erfc	Evaluates the real complementary error function.
esacr	Computes sample auto-correlations.
esacr_n	Computes sample auto-correlations on the given dimension.
esacv	Computes sample auto-covariances
esccr	Computes sample cross-correlations.
esccv	Computes sample cross-covariances.
escorc	Computes the (Pearson) sample linear cross-correlations at lag 0 only.
escorc_n	Computes the (Pearson) sample linear cross-correlations at lag 0 only, across the specified dimensions.
escovc	Computes sample cross-covariances at lag 0 only.
exp	Computes the value of e (the base of natural logarithms) raised to the power of the input.
exponential_curve_fit	Calculates the coefficients for a simple exponential curve fit of the form ' y = A*exp(B*x)' using least squares.
ezfftb	Perform a Fourier synthesis from real and imaginary coefficients.
ezfftb_n	Perform a Fourier synthesis from real and imaginary coefficients on the given dimension.
ezfftf	Perform a Fourier analysis on a real periodic sequence.
ezfftf_n	Performs a Fourier analysis on a real periodic sequence on the given dimension.
fabs	Computes the absolute value of numeric types.
fft2db	Performs a two-dimensional discrete backward Fourier transform (Fourier synthesis).
fft2df	Performs a two-dimensional forward real discrete Fourier transform (i.e., Fourier analysis) of a real periodic array.
fftshift	Rearranges an array in a manner similar to Matlab's fftshift function.
filwgts_lancos	Calculates one-dimensional filter weights (deprecated).
filwgts_lanczos	Calculates one-dimensional filter weights.
filwgts_normal	Calculates one-dimensional filter weights based upon the normal (gaussian) distribution.
floor	Returns the largest integral value less than or equal to each input value.
fourier_info	Performs Fourier analysis on one or more periodic series.
ftest	Applies F-test for variances and returns an estimate of the statistical significance.
gamma	Evaluates the complete gamma function.
gammainc	Evaluates the incomplete gamma function.
genNormalDist	Generates a normal distribution.
geolocation_circle	Create latitudes and longitudes that define concentric circles at user specified distances from a central location.
get_d2r	Return a constant that converts degrees to radians.
get_pi	Return pi as a type float or double.
get_r2d	Return a constant that converts radians to degrees.
inverse_matrix	Computes the inverse of a general matrix using LU factorization.
kde_n_test	Uses gaussian kernel density estimation (KDE) to estimate the probability density function of a random variable. This function is under construction and is available for testing only. It may not be released with NCL V6.5.0.
kf_filter	Extract equatorial waves by filtering in the Wheeler-Kiladis wavenumber-frequency domain.
kmeans_as136	Performs k-means clustering via the Hartigan and Wong AS-136 algorithm.
kolsm2_n	Uses the Kolmogorov-Smirnov two-sample test to determine if two samples are from the same distribution.
kron_product	Computes the Kronecker product for two-dimensional matrices.
linrood_latwgt	Computes the latitudes and weights used by the Lin-Rood Model.
linrood_wgt	Computes the weights used by the Lin-Rood Model.
local_max	Determines the relative maxima for a 2-dimensional array.
local_min	Determines the relative minima for a 2-dimensional array.
log	Computes the natural log of a numeric type.
log10	Computes the log base 10 of a numeric type.
lspoly	Calculates a set of coefficients for a weighted least squares polynomial fit to the given data.
lspoly_n	Calculates a set of coefficients for a weighted least squares polynomial fit to the given data on the given dimension.
max	Computes the maximum value of a multi-dimensional array.
min	Computes the minimum value of a multi-dimensional array.
mod	Remainder function which emulates the Fortran "mod" intrinsic function.
NewCosWeight	Performs cosine of the latitude weighting on the given array.
pattern_cor	Compute centered or uncentered pattern correlation.
pdfx	Generates a univariate probability density distribution (PDF).
pdfxy	Generates a joint probability density distribution. (Please use pdfxy_conform.)
pdfxy_bin	Performs looping necessary to calculate the bivariate (joint) probability distribution (see pdfxy).
pdfxy_conform	An interface to pdfxy that allows the input arrays to be different sizes.
product	Computes the product of the input.
qsort	Sorts a singly dimensioned array.
quadroots	Determine roots of a quadratic equation [ ax^2 + bx + c].
reg_multlin	Performs basic multiple linear regression analysis.
reg_multlin_stats	Performs multiple linear regression analysis including confidence estimates and creates an ANOVA table.
regcoef	Calculates the linear regression coefficient between two variables.
regCoef	Calculates the linear regression coefficient between two variables.
regCoef_n	Calculates the linear regression coefficient between two variables on the given dimensions.
regline	Calculates the linear regression coefficient between two series.
regline_stats	Performs simple linear regression including confidence estimates, an ANOVA table and 95% mean response estimates.
regline_weight	Calculates the linear regression coefficient between two series where one variable is weighted by some measure of uncertainty.
rmInsufData	Sets all instances (i.e., time) of a grid point to missing if a user-prescribed percentage of points is missing.
round	Rounds a float or double variable to the nearest whole number.
run_cor	Calculates a running correlation.
runave	Calculates an unweighted running average on the rightmost dimension.
runave_n	Calculates an unweighted running average on the given dimension.
runave_n_Wrap	Calculates an unweighted running average on the given dimension and retains metadata.
runave_Wrap	Calculates an unweighted running average on the rightmost dimension and retains metadata.
scale_values	Scale the values of an array to a user specified range.
sign_f90	Mimic the behavior of Fortran-90's sign transfer function.
sign_matlab	Mimic the behavior of Matlab's sign function.
simpeq	Integrate a sequence of equally spaced points using Simpson's Rule.
simpne	Integrates a sequence of unequally or equally spaced points using Simpson's three-point formula.
sin	Computes the sine of numeric types.
sindex_yrmo	Calculates the Southern Oscillation Index given two series of year-month values.
sinh	Computes the hyperbolic sine of numeric types.
smth9	Performs nine point local smoothing on one or more 2D grids.
smth9_Wrap	Performs nine point local smoothing on one or more 2D grids and retains metadata.
snindex_yrmo	Calculates the Southern Oscillation Index and the noise index given two series of year-month values.
solve_linsys	Computes the solution to a real system of linear equations.
sparse_matrix_mult	Multiplies a sparse matrix with a dense matrix.
spcorr	Computes Spearman rank order correlation (Rho) correlation coefficient.
spcorr_n	Computes Spearman rank order correlation (Rho) correlation coefficient across the given dimension.
specx_anal	Calculates spectra of a series.
specx_ci	Calculates the theoretical Markov spectrum and the lower and upper confidence curves.
specxy_anal	Calculates cross spectra quantities of a series.
sqrt	Computes the square root of its input.
SqrtCosWeight	Performs square-root of the cosine of the latitude weighting on the given array.
sqsort	Sorts a singly dimensioned arrays of strings.
stat2	Calculates the first two moments of the given input.
stat4	Calculates estimates of the first four moments (mean, variance, skewness, and kurtosis) of the given input.
stat_dispersion	Computes a number of robust statistics.
stat_medrng	Calculates median, range, and mid-range of the given input.
stat_trim	Calculates trimmed estimates of the first two moments of the given input.
stddev	Calculates the sample standard deviation.
student_t	Calculates the two-tailed probability of the Student-t distribution.
sum	Sums the input.
tan	Computes the tangent of numeric types.
tanh	Computes the hyperbolic tangent of numeric types.
taper	Applies split-cosine-bell tapering to one or more series across the rightmost dimension.
taper_n	Applies split-cosine-bell tapering to one or more series across the given dimension.
taylor_stats	Calculates statistics needed for the Taylor Diagram: pattern_correlation, ratio and bias.
trend_manken	Calculates Mann-Kendall non-parametric test for monotonic trend and the Theil-Sen robust estimate of linear trend.
ttest	Returns an estimate of the statistical significance and, optionally, the t-values.
unwrap_phase	Unwrap (correct) phase angles to produce smoother phase plots.
variance	Computes an unbiased estimate the variance of all input points.
wave_number_spc	Computes the total power spectrum as a function of latitudinal wave number.
wavelet	Calculates the wavelet transform of a time series and significance levels.
wavelet_default	Calculates the wavelet transform of a time series and significance levels.
weibull	Derives the shape and scale parameters for the Weibull distribution via maximum likelihood estimates.
wgt_area_smooth	Smooths an array of data using a 5-point 2D area-weighted smoothing algorithm.
wgt_areaave	Calculates the area average of a quantity using weights.
wgt_areaave2	Calculates the area average of a quantity using two-dimensional weights.
wgt_areaave_Wrap	Calculates the area average of a quantity using weights and retains metadata.
wgt_arearmse	Calculates a weighted area root-mean-square-difference between two variables.
wgt_arearmse2	Calculates a weighted area root-mean-square-difference (rmse) between two variables using two-dimensional weights.
wgt_areasum2	Calculates the area sum (total) of a quantity using two-dimensional weights.
wgt_runave	Calculates a weighted running average across the rightmost dimension.
wgt_runave_leftdim	Calculate a weighted running average over the leftmost dimension (usually, "time") and return in the original order with metadata.
wgt_runave_n	Calculates a weighted running average across the given dimension.
wgt_runave_n_Wrap	Calculates a weighted running average on the given dimension and retains metadata.
wgt_runave_Wrap	Calculates a weighted running average on the rightmost dimension and retains metadata.
wgt_volave	Calculates the volume average of a quantity using weights.
wgt_volave_ccm	Calculates the volume average of a quantity from the CCM using weights.
wgt_volrmse	Calculates a weighted volume root-mean-square-difference between two variables.
wgt_volrmse_ccm	Calculates a weighted volume root-mean-square-difference between two variables from the CCM.
wk_smooth121	Performs a specialized 1-2-1 filter for Wheeler-Kiladis plots.
zonalAve	Computes a zonal average of the input array.
zscore	Computes the zscore of a variable's given dimensions at all other dimensions and retains metadata.

Graphics routines

boxplot	Creates a boxplot.
ColorNegDashZeroPosContour	Sets the negative contours to dashed, and colors the negative, positive, and zero contours to user-specified colors.
ColorShadeLeGeContour	Shades contour regions given low and high values and two colors. (Deprecated. Use gsn_contour_shade.)
create_graphic	Creates a graphic object
draw	Draws the given graphical objects.
drawNDCGrid	Draws NDC grid lines at 0.1 NDC coordinate intervals and labels them.
geolocation_circle	Create latitudes and longitudes that define concentric circles at user specified distances from a central location.
get_isolines	Retrieves the points that define a contour line.
gsn_add_annotation	Attaches the given annotation to the given plot.
gsn_add_polygon	Attaches a filled polygon to the given plot.
gsn_add_polyline	Attaches a polyline to the given plot.
gsn_add_polymarker	Attaches polymarkers to the given plot.
gsn_add_shapefile_polygons	Attaches shapefile polygon data to the given plot(s) using randomly-filled polygons.
gsn_add_shapefile_polylines	Attaches shapefile polyline or polygon data to the given plot(s) using polylines.
gsn_add_shapefile_polymarkers	Attaches shapefile point data to the given plot(s) using polymarkers.
gsn_add_text	Attaches text strings to the given plot.
gsn_attach_plots	Attaches a series of plots to a base plot.
gsn_blank_plot	Draws a blank plot with tickmarks pointing inward.
gsn_contour	Creates and draws a contour plot.
gsn_contour_map	Creates and draws a contour plot over a map.
gsn_contour_shade	Shades contour regions given low and/or high values using colors or patterns.
gsn_coordinates	Draws or attaches the data coordinate locations on the given plot as grid lines or markers.
gsn_create_labelbar	Creates a labelbar.
gsn_create_legend	Creates a legend.
gsn_create_text	Creates text strings.
gsn_csm_attach_zonal_means	Attaches a zonal means plot to a contour/map plot.
gsn_csm_blank_plot	Draws a blank plot with tickmarks pointing outward.
gsn_csm_contour	Creates and draws a contour plot.
gsn_csm_contour_map	Creates and draws a contour plot over a map.
gsn_csm_contour_map_ce	Creates and draws a contour plot over a cylindrical equidistant map.
gsn_csm_contour_map_overlay	Creates and draws two contour plots over a map.
gsn_csm_contour_map_polar	Creates and draws a contour plot over a polar stereographic map.
gsn_csm_hov	Creates and draws a Hovmueller (time vs. longitude) plot.
gsn_csm_lat_time	Creates and draws a latitude versus time plot.
gsn_csm_map	Creates and draws a map.
gsn_csm_map_ce	Creates and draws a cylindrical equidistant map.
gsn_csm_map_polar	Creates and draws a polar stereographic map.
gsn_csm_pres_hgt	Creates and draws a pressure/height plot.
gsn_csm_pres_hgt_streamline	Creates and draws a pressure/height contour plot overlaid with streamlines.
gsn_csm_pres_hgt_vector	Creates and draws a pressure/height contour plot overlaid with vectors.
gsn_csm_streamline	Creates and draws a streamline plot.
gsn_csm_streamline_contour_map	Creates and draws streamlines over a contour plot over a map.
gsn_csm_streamline_contour_map_ce	Creates and draws streamlines over a contour plot over a cylindrical equidistant map.
gsn_csm_streamline_contour_map_polar	Creates and draws streamlines over a contour plot over a polar stereographic map.
gsn_csm_streamline_map	Creates and draws a streamline plot over a map.
gsn_csm_streamline_map_ce	Creates and draws a streamline plot over a cylindrical equidistant map.
gsn_csm_streamline_map_polar	Creates and draws a streamline plot over a polar stereographic map.
gsn_csm_streamline_scalar	Creates and draws a streamline plot, using a scalar field to color the streamlines.
gsn_csm_streamline_scalar_map	Creates and draws a streamline plot over a map, using a scalar field to color the streamlines.
gsn_csm_streamline_scalar_map_ce	Creates and draws a streamline plot over a cylindrical equidistant map, using a scalar field to color the streamlines.
gsn_csm_streamline_scalar_map_polar	Creates and draws a streamline plot over a polar stereographic map, using a scalar field to color the streamlines.
gsn_csm_time_lat	Creates and draws a time versus latitude plot.
gsn_csm_vector	Creates and draws a vector plot.
gsn_csm_vector_map	Creates and draws a vector plot over a map.
gsn_csm_vector_map_ce	Creates and draws a vector plot over a cylindrical equidistant map.
gsn_csm_vector_map_polar	Creates and draws a vector plot over a polar stereographic map.
gsn_csm_vector_scalar	Creates and draws a vector plot, and uses a scalar field to draw a separate contour plot or color the vectors.
gsn_csm_vector_scalar_map	Creates and draws a vector plot over a map, and uses a scalar field to draw a separate contour plot or color the vectors.
gsn_csm_vector_scalar_map_ce	Creates and draws a vector plot over a cylindrical equidistant map projection, and uses a scalar field to draw a separate contour plot or color the vectors.
gsn_csm_vector_scalar_map_polar	Creates and draws a vector plot over a polar stereographic map projection, and uses a scalar field to draw a separate contour plot or color the vectors.
gsn_csm_x2y	Creates and draws an XY plot with two different X axes.
gsn_csm_x2y2	Creates and draws an XY plot with two different XY axis pairs.
gsn_csm_xy	Creates and draws an XY plot.
gsn_csm_xy2	Creates and draws an XY plot with two different Y axes.
gsn_csm_xy3	Creates and draws an XY plot with three different Y axes.
gsn_csm_y	Creates and draws an XY plot, using index values for the X axis.
gsn_histogram	Draws a histogram plot on the given workstation.
gsn_labelbar_ndc	Draws a labelbar on the given workstation.
gsn_legend_ndc	Draws a legend on the given workstation.
gsn_map	Creates and draws a map.
gsn_open_wks	Opens a workstation on which to draw graphics.
gsn_panel	Draws multiple plots of identical size on a single frame.
gsn_polygon	Draws a filled polygon on the given plot.
gsn_polygon_ndc	Draws a filled polygon on the given workstation.
gsn_polyline	Draws a polyline on the given plot.
gsn_polyline_ndc	Draws a polyline on the given workstation.
gsn_polymarker	Draws polymarkers on the given plot.
gsn_polymarker_ndc	Draws polymarkers on the given workstation.
gsn_streamline	Creates and draws a streamline plot.
gsn_streamline_map	Creates and draws a streamline plot over a map.
gsn_streamline_scalar	Creates and draws a streamline plot colored by a given scalar field.
gsn_streamline_scalar_map	Creates and draws a streamline plot over a map, and colors the streamlines using the given scalar field.
gsn_table	Draws a table with text.
gsn_text	Draws text strings on the given plot.
gsn_text_ndc	Draws text strings on the given workstation.
gsn_vector	Creates and draws a vector plot.
gsn_vector_map	Creates and draws a vector plot over a map.
gsn_vector_scalar	Creates and draws a vector plot colored by a given scalar field.
gsn_vector_scalar_map	Creates and draws a vector plot over a map, and colors the vectors using the given scalar field.
gsn_xy	Creates and draws an XY plot.
gsn_y	Creates and draws an XY plot, using index values for the X axis.
infoTimeStamp	Draws two text strings at the bottom of the workstation to indicate the time the plot was created and other information.
maximize_output	Maximizes the sizes of a series of plots drawn in a single frame.
msgValOutline	Draws an outline around missing data in vector and streamline plots.
ngezlogo	Draws the NCAR logo in the lower right corner of the given workstation.
nggetp	Retrieves values for various parameters for the NCAR ngezlogo procedure.
nglogo	Draws various NCAR and UCAR logos on the given workstation.
ngsetp	Sets values for various parameters for the NCAR ngezlogo procedure.
NhlAddAnnotation	Add annotations to a plot object as an external annotation.
NhlAddOverlay	Overlays one plot object on another.
NhlAddPrimitive	Adds a Primitive object to an existing plot.
NhlDataPolygon	Draws a polygon using data coordinates.
NhlDataPolyline	Draws a polyline using data coordinates.
NhlDataPolymarker	Draws polymarkers using data coordinates.
NhlDraw	Draws the given graphical objects.
NhlNDCPolygon	Draws a polygon using NDC (Normalized Device Coordinate) units.
NhlNDCPolyline	Draws a polyline using NDC (Normalized Device Coordinate) units.
NhlNDCPolymarker	Draws polymarkers using NDC (Normalized Device Coordinate) units.
NhlNewDashPattern	Adds new dash patterns to the existing table of dash patterns.
NhlNewMarker	Adds new markers to the existing table of markers.
NhlRemoveAnnotation	Remove annotations from the plot they are registered in.
NhlRemoveOverlay	Removes one or more plots from an overlay.
NhlRemovePrimitive	Removes one or more primitives from the given Transform object.
NhlSetDashPattern	Sets the dash patterns for a given list of dash pattern indexes and workstations.
NhlSetMarker	Sets the markers for a given list of marker indexes and workstations.
overlay	Overlays one plot object on another.
paleo_outline	Creates continental outlines from model orography data.
pie_chart	Creates a basic pie chart.
reset_device_coordinates	Resets the PS/PDF device coordinates back to their default values.
setColorContourClear	Sets the color contours between two given levels to transparent.
ShadeCOI	Adds the cone of influence as a shaded polygon.
ShadeGeLeContour	Shades contour regions given low and high values and a shade pattern. (Deprecated. Use gsn_contour_shade.)
ShadeGtContour	Shades contour regions above a given value with the given fill pattern. (Deprecated. Use gsn_contour_shade.)
ShadeLtContour	Shades contour regions below a given value with the given fill pattern. (Deprecated. Use gsn_contour_shade.)
ShadeLtGtContour	Shades contour regions below a given value and above a given value with the specified fill patterns. (Deprecated. Use gsn_contour_shade.)
simple_legend	Creates a legend based on user supplied resources.
simple_legend_ndc	Creates a legend in NDC space based on user supplied resources.
skewT_BackGround	Creates a background chart for Skew T, Log P plotting.
skewT_PlotData	Plot a sounding and (optionally) winds on Skew T, Log P charts created by skewT_BackGround.
symMinMaxPlt	Calculates the minimum/maximum values for a variable and uses nice_mnmxintvl to calculate the symmetric contour interval.
tdclrs	Defines a set of colors for use with selected TDPACK routines.
tdctri	Cuts the triangles in a triangle list with a plane perpendicular to an axis (for use with selected TDPACK routines).
tdcudp	Not yet implemented.
tdcurv	Draws the projection of a curve defined by an array of points in 3-space.
tddtri	Draws triangles defined by a triangle list (for use with selected TDPACK routines).
tdez2d	Draws a surface on the specified workstation.
tdez3d	Draws an isosurface on the specified workstation.
tdgetp	Retrieves TDPACK parameter values.
tdgrds	Draws perimeters, ticks, and grid lines on the six sides of a box (for use with selected TDPACK routines).
tdgrid	Draws a grid on a particular face of a box in 3-space (for use with selected TDPACK routines).
tdgtrs	Gets the definition of a specified rendering style (for use with selected TDPACK routines).
tdinit	Defines eye position, line of sight, up direction, and stereo flag for selected TDPACK routines.
tditri	Adds triangles defining an isosurface to a triangle list (for use with selected TDPACK routines).
tdlbla	Draws labels for a particular face of a box in 3-space (for use with selected TDPACK routines).
tdlblp	Not yet implemented.
tdlbls	Draws labels for all faces of a box in 3-space (for use with selected TDPACK routines).
tdline	Draws the projection of a solid line in 3-space (for use with selected TDPACK routines).
tdlndp	Not yet implemented.
tdlnpa	Draws the projection of a line joining two points in the reference parallelogram (for use with selected TDPACK routines).
tdlpdp	Not yet implemented.
tdmtri	Adds triangles defining a 3D marker to a triangle list for use with selected TDPACK routines.
tdotri	Orders the triangles in a triangle list for proper rendering (for use with selected TDPACK routines).
tdpara	Defines the reference parallelogram for use with selected TDPACK routines.
tdplch	Draws a string in the plane of the reference parallelogram (for use with selected TDPACK routines).
tdprpa	Retrieves the coordinates of a projection in the projection plane, given the parallelogram coordinates of a point (for use with selected TDPACK routines).
tdprpi	Retrieves the parallelogram coordinates of a point in the reference parallelogram, given a point in the projection plane (for use with selected TDPACK routines.)
tdprpt	Retrieves the coordinates of its projection in the projection plane, given the coordinates of a point in 3-space (for use with selected TDPACK routines).
tdsetp	Sets TDPACK parameter values.
tdsort	Sorts an array (for use with selected TDPACK routines).
tdstri	Adds triangles defining a simple surface to a triangle list (for use with selected TDPACK routines).
tdstrs	Sets the values defining a selected rendering style (for use with selected TDPACK routines).
tdttri	Adds triangles defining a trajectory to a triangle list (for use with selected TDPACK routines).
WindRoseBasic	Plots a basic wind rose.
WindRoseColor	Plot a wind rose diagram where different colors are used to differentiate speed ranges.
WindRoseThickLine	Plot a black and white wind rose diagram where different line thicknesses are used to differentiate speed ranges.
wmbarb	Draws wind barbs on the given workstation.
wmbarbmap	Draws wind barbs over maps.
wmdrft	Draws weather front lines on the given workstation.
wmgetp	Retrieves parameter values for selected Wmap routines.
wmlabs	Plots special symbols and icons for daily weather.
wmsetp	Sets parameter values for selected Wmap routines.
wmstnm	Plots station model data on the given workstation.
wmvect	Draws vectors on the given workstation.
wmvectmap	Draws vectors over maps.
wmvlbl	Draws an informational label box for plots produced by wmvect or wmvectmap.
wrf_contour	Creates a contour plot from ARW WRF model output.
wrf_map	Creates a map background for ARW WRF model data.
wrf_map_overlay	Overlays WRF plot(s) on a WRF-ARW map background (deprecated).
wrf_map_overlays	Overlays contour and vector plots on a WRF-ARW map background.
wrf_map_resources	Sets map plotting resources based on an input WRF-ARW file.
wrf_map_zoom	Zooms into a portion of the ARW WRF model domain, and creates a map background (deprecated).
wrf_overlay	Overlays multiple plots created from other WRF-ARW plot functions (deprecated).
wrf_overlays	Overlays multiple plots, created from other ARW WRF plot functions.
wrf_vector	Creates a vector plot from ARW WRF model output.

Group creators

filegrpdef

Defines a list of group (names), for a supported file, or group.

Group query

getfilegrpnames

Returns an array of file group names on the given file.

Heat stress

fire_index_haines	Computes the Haines fire index (aka: Lower Atmosphere Severity Index) from a sounding.
heat_apptemp	Compute apparent temperature.
heat_discoi	Compute a simplified human discomfort index.
heat_discoi_stull	Compute the human discomfort index due to excessive heat and humidity using the Stull wet bulb temperature (wetbulb_stull).
heat_esidx_moran	Compute an environmental stress index (ESI) which is an alternative to the wet bulb globe temperature (WBGT).
heat_humidex	Compute the 'feels-like' temperature for humans.
heat_index_nws	Compute the 'heat index' as calculated by the National Weather Service.
heat_swamp_cooleff	Compute the swamp cooler temperatures at 65% amd 80% efficiency.
heat_thic_thip	Compute the thermal humidity comfort index (thic) and the thermal humidity physiology index (thip).
heat_wbgt_inout	Compute the composite Wet-Bulb Globe Temperature (WBGT) index with options for indoor or outdoor formulations.
heat_wbgt_simplified	Simplified WBGT index.

Interpolation

area_conserve_remap	Performs areal conservative remapping from one rectilinear grid to another.
area_conserve_remap_Wrap	Performs areal conservative remapping from one rectilinear grid to another and retains metadata.
area_hi2lores	Interpolates from high resolution rectilinear grids to low resolution recitlinear grids using local area averaging.
area_hi2lores_Wrap	Interpolates from high resolution rectilinear grids to low resolution rectilinear grids using local area averaging and retains metadata.
bin_avg	Calculates gridded binned averages and counts on a rectilinear grid using randomly spaced data.
csa1	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1d	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1s	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1x	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1xd	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1xs	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa2	Calculates an approximating cubic spline for two-dimensional input data.
csa2d	Calculates an approximating cubic spline for two-dimensional input data.
csa2l	Calculates an approximating cubic spline for two-dimensional input data.
csa2ld	Calculates an approximating cubic spline for two-dimensional input data.
csa2ls	Calculates an approximating cubic spline for two-dimensional input data.
csa2lx	Calculates an approximating cubic spline for two-dimensional input data.
csa2lxd	Calculates an approximating cubic spline for two-dimensional input data.
csa2lxs	Calculates an approximating cubic spline for two-dimensional input data.
csa2s	Calculates an approximating cubic spline for two-dimensional input data.
csa2x	Calculates an approximating cubic spline for two-dimensional input data.
csa2xd	Calculates an approximating cubic spline for two-dimensional input data.
csa2xs	Calculates an approximating cubic spline for two-dimensional input data.
csa3	Calculates an approximating cubic spline for three-dimensional input data.
csa3d	Calculates an approximating cubic spline for three-dimensional input data.
csa3l	Calculates an approximating cubic spline for three-dimensional input data.
csa3ld	Calculates an approximating cubic spline for three-dimensional input data.
csa3ls	Calculates an approximating cubic spline for three-dimensional input data.
csa3lx	Calculates an approximating cubic spline for three-dimensional input data.
csa3lxd	Calculates an approximating cubic spline for three-dimensional input data.
csa3lxs	Calculates an approximating cubic spline for three-dimensional input data.
csa3s	Calculates an approximating cubic spline for three-dimensional input data.
csa3x	Calculates an approximating cubic spline for three-dimensional input data.
csa3xd	Calculates an approximating cubic spline for three-dimensional input data.
csa3xs	Calculates an approximating cubic spline for three-dimensional input data.
csc2s	Converts Cartesian coordinates on a unit sphere to spherical coordinates (lat/lon).
csgetp	Retrieves control parameters for Cssgrid routines.
css2c	Converts spherical coordinates (lat/lon) to Cartesian coordinates on a unit sphere.
cssetp	Sets control parameters for Cssgrid routines.
cssgrid	Uses tension splines to interpolate unstructured (randomly-spaced) data on a unit sphere to data values on a rectilinear grid.
cssgrid_Wrap	Uses tension splines to interpolate unstructured (randomly-spaced) data on a unit sphere to data values on a rectilinear grid (retains metadata).
csstri	Calculates a Delaunay triangulation of data randomly positioned on the surface of a sphere.
csvoro	Determines Voronoi polygons for data randomly positioned on a sphere and returns vertices for the one surrounding a specified input point.
curvilinear_to_SCRIP	Writes the description of a curvilinear grid to a SCRIP file.
dsgetp	Gets parameters for Dsgrid routines.
dsgrid2	Interpolates data from an unstructured (randomly-spaced) grid to a rectilinear grid using inverse distance weighted interpolation.
dsgrid2d	Interpolates double data from an unstructured (randomly-spaced) grid to a rectilinear grid using inverse distance weighted interpolation. (Deprecated version.)
dsgrid2s	Interpolates float data from an unstructured (randomly-spaced) grid to a rectilinear grid using inverse distance weighted interpolation. (Deprecated version.)
dsgrid3	Interpolates data from an unstructured (randomly-spaced) grid to a 3D grid using inverse distance weighted interpolation.
dsgrid3d	Interpolates double data from an unstructured (randomly-spaced) grid to a 3D grid using inverse distance weighted interpolation. (Deprecated version.)
dsgrid3s	Interpolates float data from an unstructured (randomly-spaced) grid to a 3D grid using inverse distance weighted interpolation. (Deprecated version.)
dspnt2	Interpolates 2D data at specified points.
dspnt2d	Interpolates 2D data at specified points. (Deprecated version.)
dspnt2s	Interpolates 2D float data at specified points. (Deprecated version.)
dspnt3	Interpolates 3D data at specified points.
dspnt3d	Interpolates 3D double data at specified points. (Deprecated version.)
dspnt3s	Interpolates 3D float data at specified points. (Deprecated version.)
dssetp	Sets parameters for Dsgrid routines.
ESMF_regrid	Regrids data from one lat/lon grid to another, using ESMF software.
ESMF_regrid_gen_weights	Writes a weight file using the offline ESMF weight generator.
ESMF_regrid_with_weights	Using the provided weight file, regrids data from one lat/lon grid to another.
ftcurv	Calculates an interpolatory spline through a sequence of functional values.
ftcurvd	Calculates the derivatives of an interpolatory spline under tension.
ftcurvi	Calculates integrals of an interpolatory spline under tension between two user-specified limits.
ftcurvp	Calculates an interpolatory spline under tension through a sequence of functional values for a periodic function.
ftcurvpi	Calculates an integral of an interpolatory spline between two specified points.
ftcurvps	Calculates a smoothing spline.
ftcurvs	Calculates a smoothing spline.
ftgetp	Retrieves control parameters for Fitgrid routines.
ftkurv	Calculates an interpolatory spline for parametric curves.
ftkurvd	Calculates an interpolatory spline for parametric curves; it also calculates first and second derivatives of the interpolatory spline.
ftkurvp	Calculates an interpolatory spline under tension through a sequence of points in the plane forming a closed curve.
ftkurvpd	Calculates an interpolatory spline for closed parametric curves; it also calculates first and second derivatives of the interpolatory spline.
ftsetp	Sets control parameters for Fitgrid routines.
ftsurf	Calculates an interpolatory surface passing through a rectangular grid of function values.
idsfft	Interpolates 2D random data.
int2p	Interpolates pressure levels to a different set of pressure levels.
int2p_n	Interpolates pressure levels to a different set of pressure levels on the given dimension.
int2p_n_Wrap	Interpolates pressure levels to a different set of pressure levels and returns metadata.
int2p_Wrap	Interpolates pressure levels to a different set of pressure levels and returns metadata.
latlon_to_SCRIP	Writes the description of a lat/lon grid to a SCRIP file.
linint1	Interpolates from one series to another using piecewise linear interpolation across the rightmost dimension.
linint1_n	Interpolates from one series to another using piecewise linear interpolation across the given dimension.
linint1_n_Wrap	Interpolates from one series to another using piecewise linear interpolation across the given dimension, and retains metadata.
linint1_Wrap	Interpolates from one series to another using piecewise linear interpolation, and retains metadata.
linint2	Interpolates from a rectilinear grid to another rectilinear grid using bilinear interpolation.
linint2_points	Interpolates from a rectilinear grid to an unstructured grid or locations using bilinear interpolation.
linmsg	Linearly interpolates to fill in missing values.
linmsg_n	Linearly interpolates to fill in missing values, given the dimension to do the interpolation across.
natgrid	Interpolates data from an unstructured (randomly-spaced) grid to a rectilinear grid using natural neighbor interpolation.
natgrid_Wrap	Interpolates data from an unstructured (randomly-spaced) grid to a rectilinear grid using natural neighbor interpolation and retains metadata.
natgridd	Interpolates double data on an unstructured grid to a rectilinear grid. (Deprecated version.)
natgrids	Interpolates float data on an unstructured grid to a rectilinear grid. (Deprecated version.)
nngetaspectd	Retrieves an aspect at a specified coordinate position.
nngetaspects	Retrieves an aspect at a specified coordinate position.
nngetp	Retrieves control parameters for Natgrid routines.
nngetsloped	Retrieves a slope at a specified coordinate position.
nngetslopes	Retrieves a slope at a specified coordinate position.
nngetwts	Retrieves natural neighbors and weights for the function values at those neighbors.
nngetwtsd	Retrieves natural neighbors and weights for the function values at those neighbors.
nnpnt	Interpolates from 2D random data to get values at a specified set of points.
nnpntd	Interpolates from 2D random double data to get values at a specified set of points. (Deprecated version.)
nnpntend	Terminates interpolation from 2D random data to get values at a specified set of points.
nnpntendd	Terminates interpolation from 2D random data to get values at a specified set of points.
nnpntinit	Initializes internal quantities, for given input data, to allow subsequent nnpnt calls to interpolate at specified points.
nnpntinitd	Initializes internal quantities, for given input data, to allow subsequent nnpntd calls to interpolate at specified points.
nnpntinits	Initializes internal quantities, for given input data, to allow subsequent nnpnts calls to interpolate at specified points.
nnpnts	Interpolates from 2D random float data to get values at a specified set of points. (Deprecated version.)
nnsetp	Sets control parameters for Natgrid routines.
obj_anal_ic	Iterative improvement objective analysis.
obj_anal_ic_deprecated	Iterative correction objective analysis (Cressman, Barnes) (deprecated)
obj_anal_ic_Wrap	Iterative improvement objective analysis and returns meta data.
poisson_grid_fill	Replaces all missing (_FillValue) values in a grid with values derived from solving Poisson's equation via relaxation.
rcm2points	Interpolates data on a curvilinear grid (i.e. RCM, WRF, NARR) to an unstructured grid.
rcm2rgrid	Interpolates data on a curvilinear grid (i.e. RCM, WRF, NARR) to a rectilinear grid.
rectilinear_to_SCRIP	Writes the description of a rectilinear grid to a SCRIP file.
rgrid2rcm	Interpolates data on a rectilinear lat/lon grid to a curvilinear grid like those used by the RCM, WRF and NARR models/datasets.
shgetnp	Finds the nearest point, or points (in a specified set of points), to a given point in 3-space.
shgetp	Retrieves control parameters for Shgrid routines.
shgrid	Interpolates data from an unstructured grid to a grid in 3-space.
shsetp	Sets control parameters for Shgrid routines.
sigma2hybrid	Interpolates from sigma to hybrid coordinates.
trop_wmo	Determines the level of the thermal tropopause.
unstructured_to_ESMF	Writes the description of an unstructured grid to an ESMF file.
wrf_interp_1d	Linearly interpolates a one-dimensional variable in the vertical.
wrf_interp_2d_xy	Extracts a cross section from a given input field.
wrf_interp_3d_z	Interpolates to a specified pressure/height level.
wrf_user_interp_level	Interpolates a horizontal slice from a three-dimensional WRF-ARW field at the given vertical level(s).
wrf_user_interp_line	Interpolates a two-dimensional WRF-ARW field along a line.
wrf_user_intrp2d	Interpolates ARW WRF 2D model data along a given line (deprecated).
wrf_user_intrp3d	Interpolates ARW WRF model data vertically or horizontally (deprecated).
wrf_user_unstagger	Unstaggers an input variable along a specified dimension.
wrf_user_vert_cross	Interpolates a vertical cross-section from a three-dimensional WRF-ARW field at the given vertical level(s).
wrf_user_vert_interp	Vertically interpolates ARW WRF variables given the type of surface and a set of new levels.

Lat/lon functions

add90LatX	Adds two fake pole points (90S and 90N) to the rightmost dimension of the given data.
add90LatY	Adds two fake pole points (90S and 90N) to the leftmost dimension of the given data.
area_poly_sphere	Calculates the area enclosed by an arbitrary polygon on the sphere.
bin_avg	Calculates gridded binned averages and counts on a rectilinear grid using randomly spaced data.
bin_sum	Calculates binned sums and counts over multiple invocations of the procedure on a rectilinear grid.
gaus	Computes Gaussian latitudes and weights.
gaus_lobat	Computes Gaussian latitudes and weights using Gauss-Lobatto quadrature.
gaus_lobat_wgt	Computes Gauss-Lobatto weights given a one-dimensional array of Gauss-Lobatto latitudes.
gc_aangle	Finds the acute angle between two great circles on the globe.
gc_clkwise	Tests clockwise/counterclockwise ordering of points on spherical polygon.
gc_dangle	Finds the directed angle between two great circles having a specified intersection point.
gc_inout	Determines if a list of lat/lon specified points are inside or outside of spherical lat/lon polygon(s).
gc_latlon	Finds the great circle distance (true surface distance) between two points on the globe and interpolates points along the great circle.
gc_onarc	Determines if a point on the globe lies on a specified great circle arc.
gc_pnt2gc	Finds the angular distance from a point to a great circle.
gc_qarea	Finds the area of a quadrilateral patch on the unit sphere.
gc_tarea	Finds the area of a triangular patch on the unit sphere.
getind_latlon2d	Returns the indices (subscripts) of two-dimensional latitude/longitude arrays closest to a user-specified latitude/longitude coordinate pair.
landsea_mask	Returns a grid that contains a land/sea mask given any latitude and longitude array.
latGau	Generates gaussian latitudes and associated metadata.
latGauWgt	Generates gaussian weights and associated metadata.
latGlobeF	Generates latitudes and associated metadata for a global fixed grid.
latGlobeFo	Generates latitudes and associated metadata for a global fixed offset grid.
latlon2utm	Converts from lat/lon to UTM using a specified datum.
latRegWgt	Generates [sin(lat+dlat/2)-sin(lat-dlat/2)] weights for equally spaced (regular) global grids that will sum to 2.0.
lonFlip	Reorders a global rectilinear array about the central longitude coordinate variable.
lonGlobeF	Generates longitudes and associated metadata for a global fixed grid.
lonGlobeFo	Generates longitudes and associated metadata for a global fixed offset grid.
lonPivot	Pivots an array about a user-specified longitude (rectilinear grids only).
nggcog	Calculates the latitudes and longitudes of a set of points approximating a circle at a given point on the surface of the globe.
niceLatLon2D	Check two-dimensional map coordinates to see if they have a "nice" structure.
NormCosWgtGlobe	Create normalized cosine weights that sum to 2.0.
plt_pdfxy	Creates a nice plot of the joint probability array created by the pdfxy function.
region_ind	Returns the indices (subscripts) of two-dimensional latitude/longitude arrays that span user specified latitude/longitude boundaries.
utm2latlon	Converts from UTM to lat/lon using a specified datum.
wrf_ij_to_ll	Finds the nearest longitude, latitude locations to the specified model grid indices (i,j) (deprecated).
wrf_latlon_to_ij	Finds the nearest model grid indices (i,j) to the specific location(s) in latitude and longitude (deprecated).
wrf_ll_to_ij	Finds the nearest model grid indices (i,j) to the specified location(s) in longitude and latitude (deprecated).
wrf_user_ij_to_ll	Finds the nearest longitude, latitude locations to the specified WRF-ARW model grid indexes (deprecated).
wrf_user_ll_to_ij	Finds the nearest WRF-ARW model grid indexes (i,j) to the requested longitude and latitude locations (deprecated).
wrf_user_ll_to_xy	Finds the nearest WRF-ARW model grid indexes (0-based) that are the closest to the requested longitude and latitude locations.
wrf_user_xy_to_ll	Finds the nearest longitude, latitude locations to the specified WRF-ARW model grid indexes.

List routines

ListAppend	Append a variable into the list.
ListCount	Queries the number of element(s) in a list.
ListGetType	Queries the manner in which a variable of type list was created.
ListIndex	Queries the index of a variable in a list.
ListIndexFromName	Returns the index of a variable in a list given its name.
ListPop	Pop (out) an element from a list.
ListPush	Push a variable into the list.
ListSetType	Specifies the manner in which a variable of type list is to be implemented.
NewList	Create a list (type variable).

Metadata routines

assignFillValue	Transfers the _FillValue attribute from one variable to another.
copy_VarAtts	Copies all of a variable's attributes from one variable to another.
copy_VarCoords	Copies all named dimensions and coordinate variables from one variable to another.
copy_VarCoords_1	Copies all named dimensions and coordinate variables from one variable to another except for the rightmost dimension.
copy_VarCoords_2	Copies all named dimensions and coordinate variables from one variable to another except for the rightmost two dimensions.
copy_VarMeta	Copies all attributes, named dimensions and coordinate variables from one variable to another.
copyatt	Copies all attributes, named dimensions and coordinate variables from one variable to another (deprecated version).
default_fillvalue	Returns the default missing value for the given variable type.
delete_VarAtts	Deletes one or more attributes associated with a variable.
extract_globalatts_hdf5	Extract value from 'KEYWORD,VALUE' pair returned by getfilevaratts_hdf5.
getfileatts	Returns a list of attribute names on the given file.
getfiledimnames	Returns a list of dimension names for the given file.
getfiledims	Returns a list of dimension names for the given file.
getfilevaratts	Returns all attribute names associated with a variable on the given file.
getfilevardimnames	Returns all dimension names associated with a variable on the given file.
getfilevardims	Returns all dimension names associated with a variable on the given file.
getfilevarnames	Returns an array of file variable names on the given file.
getFillValue	Retrieves the _FillValue of a variable, if present, for use in a new statement.
getvaratts	Returns a list of attribute names for the given variable or file pointer.
getvardimnames	Returns a list of dimension names for the given variable.
getvardims	Returns a list of dimension names for the given variable.
getvardimsizes	Returns the dimension sizes of the input variable.
getVarFillValue	Retrieves the missing value of a variable, otherwise, it returns the default _FillValue.
isatt	Returns logical values indicating whether the given attributes are attached to the given variable.
iscoord	Returns True for every input string that is a coordinate variable of the given variable.
isdim	Returns True if variable dimensions are defined in the given variable.
isdimnamed	Returns True if variable dimensions have names in given variable.
ismissing	Returns True for every element of the input that contains a missing value (_FillValue).
isunlimited	Returns True if the given dimension name is defined as unlimited on the given file.
nameDim	Assigns given named dimensions, long_name, and units to the input variable.
parse_globalatts_hdf5	Parse a HDF5 global attribute into an array containing KEYWORDs and associated VALUEs.
set_default_fillvalue	Sets the default missing value for the given variable type.

Meteorology

actvpr_mnmx_fao56	Compute actual vapor pressure via equation 17 as described in FAO 56.
actvpr_rhmean_fao56	Compute actual vapor pressure via equation 19 as described in FAO 56.
advect_variable	Use "highly accurate" spherical harmonics to estimate gradients and advect a variable horizontally on a global rectilinear grid.
advect_variable_cfd	Using centered-finite_differences (cfd) to estimate gradients, advect a variable horizontally on a regional or global rectilinear grid.
angmom_atm	Calculates the atmosphere's relative angular momentum.
beta_dfdy_rossby	Compute the Rossby parameter [beta=df/dy] which is the meridional variation of the Coriolis parameter.
brunt_vaisala_atm	Compute the Brunt-Vaisala frequency which is a measure of bouyancy in a continuously stratified atmosphere.
coriolis_param	Calculate the Coriolis parameter.
daylight_fao56	Compute maximum number of daylight hours as described in FAO 56.
dewtemp_trh	Calculates the dew point temperature given temperature and relative humidity.
dpres_plevel	Calculates the pressure layer thicknesses of a constant pressure level coordinate system.
eady_growth_rate	Compute the maximum Eady growth rate.
enthalpy	Compute atmospheric enthalpy.
epflux	Compute quasi-geostrophic Eliassen-Palm fluxes at isobaric levels using NCEP Reanalysis.
fire_index_haines	Computes the Haines fire index (aka: Lower Atmosphere Severity Index) from a sounding.
fluxEddy	Calculates time averaged eddy flux quantities.
grad_latlon_cfd	Compute the meridional and zonal gradients of a variable on a global or limited area rectilinear grid.
hydro	Computes geopotential height using the hydrostatic equation.
hyi2hyo	Interpolates from data on one set of hybrid levels to another set of hybrid levels.
hyi2hyo_Wrap	Interpolates from data on one set of hybrid levels to another set of hybrid levels and preserves metadata.
kf_filter	Extract equatorial waves by filtering in the Wheeler-Kiladis wavenumber-frequency domain.
latent_heat_water	Estimate latent heat flux for water: evaporization (condensation), melting (freezing) or sublimation (deposition).
lclvl	Calculates the pressure of the lifting condensation level.
mixhum_convert	Convert mixing ratio to specific humidity or vice-versa.
mixhum_ptd	Calculates the mixing ratio or specific humidity given pressure and dew point temperature.
mixhum_ptrh	Calculates the mixing ratio or specific humidity given pressure, temperature and relative humidity.
netlw_fao56	Compute longwave radiation as described in FAO 56.
netsw_fao56	Compute net shortwave radiation as described in FAO 56.
omega_to_w	Convert omega vertical velocity (Pa/s) to (m/s).
pot_temp	Compute potential temperature.
pot_temp_equiv	Compute the equivalent potential temperature using an approximation which does not use the lifting condensation temperature.
pot_temp_equiv_tlcl	Compute equivalent potential temperature using the lifting condensation temperature.
pot_vort_hybrid	Compute potential vorticity on hybrid levels and a global grid.
pot_vort_isobaric	Compute potential vorticity on isobaric levels and a global rectilinear grid.
prcwater_dp	Computes total column precipitable water of the rightmost dimension.
precip_rain_snow	Partition monthly precipitation totals into rain and snow amount using an empirical relationship.
pres2hybrid	Interpolates data on constant pressure levels to hybrid levels.
pres2hybrid_Wrap	Interpolates data on constant pressure levels to hybrid levels and retains metadata.
pres_sigma	Calculates the pressure at specified sigma levels.
prsatm_tz_fao56	Compute atmospheric pressure as described in FAO 56.
prsatm_z_fao56	Compute atmospheric pressure using the approximation described in FAO 56: Chapter 3; equation 7.
pslec	Computes sea level pressure from CCM/CAM hybrid model variables using the ECMWF formulation.
pslhor	Computes sea level pressure from CCM/CAM hybrid model variables using the ECMWF formulation and Trenberth's horizontal correction.
pslhyp	Computes sea level pressure using the hypsometric equation.
psychro_fao56	Computes the psychrometric constant [kPa/C] as described in FAO 56.
qvector_isobaric	Use "highly accurate" spherical harmonics to derive the Q-vector components on a global grid.
qvector_isobaric_cfd	Use centered finite differences to derive the Q-vector components on a global or regional grid.
radext_fao56	Compute extraterrestrial radiation for daily periods as described in FAO 56.
radsol2_fao56	Compute solar radiation from daily sunshine and day-of-year as described in FAO 56.
radsol3_hargreaves_fao56	Compute solar radiation derived from air temperature differences using Hargreaves method as described in FAO 56.
radsol_clrsky_fao56	Compute clear sky solar radiation as described in FAO 56.
radsol_fao56	Compute solar radiation via the 'Angstrom Formula' which uses extraterrestrial radiation and relative sunshine as described in FAO 56 (equation 35).
rdsstoi	Reads weekly/monthly compocp site and climatology grids.
refevt_hamon	Use the Hamon formulation to derive reference evapotranspiration.
refevt_hargreaves_fao56	Use the Hargreaves ETo equation to derive reference evapotranspiration as described in FAO 56.
refevt_penman_fao56	Use the full Penman-Monteith equation to derive reference evapotranspiration as described in FAO 56.
refevt_turc	Use the Turc ETo formulation to derive reference evapotranspiration.
refevt_turc_rh	Use the Turc ETo formulation with a correction for low relative humidity to derive reference evapotranspiration.
relhum	Calculates relative humidity given temperature, mixing ratio, and pressure.
relhum_ice	Calculates relative humidity with respect to ice, given temperature, mixing ratio, and pressure.
relhum_ttd	Calculates relative humidity given temperature and dew point temperature.
relhum_water	Calculates relative humidity with respect to water, given temperature, mixing ratio, and pressure.
rhum_fao56	Compute relative humidity as described in FAO 56.
rigrad_bruntv_atm	Compute the atmospheric gradient Richardson number and, optionally, the Brunt-Vaisala, buoyancy and shear.
satvpr_mean_fao56	Compute mean saturation vapor pressure using minimum and maximum temperature temperature as described in FAO 56.
satvpr_slope_fao56	Compute the slope of the saturation vapor pressure curve as described in FAO 56.
satvpr_tdew_fao56	Compute actual saturation vapor pressure as described in FAO 56.
satvpr_temp_fao56	Compute saturation vapor pressure using temperature as described in FAO 56.
satvpr_water_bolton	Estimate the saturation vapor pressure over water using Bolton's equation 10.
satvpr_water_stipanuk	Estimate the saturation vapor pressure over water using the Stipanuk approximation.
shear_stretch_deform	Using spherical harmonics, estimate the kinematic shear-deformation, stretch-deformation and total-deformation of a global horizontal (east-west) wind field.
shear_stretch_deform_cfd	Using centered-finite-differences, estimate the kinematic shear-deformation, stretch-deformation and total-deformation of a global or regional horizontal (east-west) wind field.
soil_heatflux_month_fao56	Compute soil heat flux for monthly periods as described in FAO 56.
static_energy_atm	Compute the atmospheric moist and dry static energy.
static_stability	Compute static stability.
stdatmus_p2tdz	Calculates the corresponding temperature, density, and height based on the 1976 U.S. standard atmosphere, given the pressure.
stdatmus_z2tdp	Calculates the corresponding temperature, density, and pressure based on the 1976 U.S. standard atmosphere, given the height.
tdew_actvpr_fao56	Compute dew point temperature as a function of actual vapor pressure as described in FAO 56.
temp_virtual	Compute atmospheric virtual temperature.
thornthwaite	Estimate the potential evapotranspiration (PET) via the Thornthwaite method.
tlcl_evp_bolton	Compute the lifting condensation level temperature using water vapor pressure.
tlcl_mixr_bolton	Compute the lifting condensation level temperature using mixing ratio and pressure.
tlcl_rh_bolton	Compute the lifting condensation level temperature using relative humidity.
tlcl_td_bolton	Compute the lifting condensation level temperature using dew point temperature.
u2_fao56	Compute 2-meter wind speed (m/s) as described in FAO 56.
uv2dv_cfd	Computes divergence using centered finite differences.
uv2vr_cfd	Computes relative vorticity using centered finite differences.
vapor_pres_rh	Compute vapor pressure given relative humidity (%) and saturation vapor pressure.
vibeta	Performs vertical integration using beta factors.
w_to_omega	Convert vertical velocity with units (m/s) to Pa/s.
wetbulb	Compute wetbulb temperature.
wetbulb_stull	Calculate wet bulb temperature at standard sea level pressure (1013.25 hPa) using the method of R.Stull.
wgt_vertical_n	Calculates a weighted vertical average and/or sum (integral).
wind_component	Calculate zonal and meridional wind components from wind speed and wind direction.
wind_direction	Calculate meteorological wind direction from zonal and meridional wind components.
wind_speed	Calculate wind speed from zonal and meridional wind components.
wind_stats	Given a sequence of wind speeds and directions, compute assorted wind-related statistics including the standard deviation of the wind direction.
z2geouv	Computes the geostrophic zonal and meridional wind components using geopotential height on isobaric levels (rectilinear grid only).
zonal_mpsi	Computes a zonal mean meridional stream function.
zonal_mpsi_Wrap	Computes a zonal mean meridional stream function and retains metadata.

NCL object routines

attsetvalues	Applies resources to the given objects.
create_graphic	Creates a graphic object
destroy	Destroys objects from NCL.
get_isolines	Retrieves the points that define a contour line.
list_hlus	Lists all of the HLU objects currently referenced by NCL variables.
NhlAddAnnotation	Add annotations to a plot object as an external annotation.
NhlAddData	Adds one or more additional data items to a plot.
NhlAddOverlay	Overlays one plot object on another.
NhlAddPrimitive	Adds a Primitive object to an existing plot.
NhlAppGetDefaultParentId	Returns a reference to the current default App object.
NhlClassName	Retrieve the class name of one or more NCL objects.
NhlDestroy	Destroys objects from NCL.
NhlGetBB	Retrieves the bounding boxes of a list of NCL objects.
NhlGetClassResources	Returns a list of resources associated with the given class name and an optional filter string.
NhlGetErrorObjectId	Returns a reference to the current Error object.
NhlGetParentId	Returns the ids of the parent ids of the given objects.
NhlGetWorkspaceObjectId	Returns a reference to the current Workspace object.
NhlIsApp	Returns True for each given object that is an App object.
NhlIsDataComm	Returns True for each given object that is a DataComm object.
NhlIsDataItem	Returns True for each given object that is a DataItem object.
NhlIsDataSpec	Returns True for each given object that is a DataSpec object.
NhlIsTransform	Returns True for each given object that is a Transform object.
NhlIsView	Returns True for each given object that is a View object.
NhlName	Retrieves the name of one or more NCL objects.
NhlRemoveAnnotation	Remove annotations from the plot they are registered in.
NhlRemoveData	Removes data items from one or more plots.
NhlRemoveOverlay	Removes one or more plots from an overlay.
NhlRemovePrimitive	Removes one or more primitives from the given Transform object.
NhlUpdateData	Forces the DataComm instances to update their internal states.
overlay	Overlays one plot object on another.

Ngmath routines

csa1	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1d	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1s	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1x	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1xd	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa1xs	Calculates an approximating cubic spline for the input data, one 1-dimensional section at a time.
csa2	Calculates an approximating cubic spline for two-dimensional input data.
csa2d	Calculates an approximating cubic spline for two-dimensional input data.
csa2l	Calculates an approximating cubic spline for two-dimensional input data.
csa2ld	Calculates an approximating cubic spline for two-dimensional input data.
csa2ls	Calculates an approximating cubic spline for two-dimensional input data.
csa2lx	Calculates an approximating cubic spline for two-dimensional input data.
csa2lxd	Calculates an approximating cubic spline for two-dimensional input data.
csa2lxs	Calculates an approximating cubic spline for two-dimensional input data.
csa2s	Calculates an approximating cubic spline for two-dimensional input data.
csa2x	Calculates an approximating cubic spline for two-dimensional input data.
csa2xd	Calculates an approximating cubic spline for two-dimensional input data.
csa2xs	Calculates an approximating cubic spline for two-dimensional input data.
csa3	Calculates an approximating cubic spline for three-dimensional input data.
csa3d	Calculates an approximating cubic spline for three-dimensional input data.
csa3l	Calculates an approximating cubic spline for three-dimensional input data.
csa3ld	Calculates an approximating cubic spline for three-dimensional input data.
csa3ls	Calculates an approximating cubic spline for three-dimensional input data.
csa3lx	Calculates an approximating cubic spline for three-dimensional input data.
csa3lxd	Calculates an approximating cubic spline for three-dimensional input data.
csa3lxs	Calculates an approximating cubic spline for three-dimensional input data.
csa3s	Calculates an approximating cubic spline for three-dimensional input data.
csa3x	Calculates an approximating cubic spline for three-dimensional input data.
csa3xd	Calculates an approximating cubic spline for three-dimensional input data.
csa3xs	Calculates an approximating cubic spline for three-dimensional input data.
csc2s	Converts Cartesian coordinates on a unit sphere to spherical coordinates (lat/lon).
csgetp	Retrieves control parameters for Cssgrid routines.
css2c	Converts spherical coordinates (lat/lon) to Cartesian coordinates on a unit sphere.
cssetp	Sets control parameters for Cssgrid routines.
cssgrid	Uses tension splines to interpolate unstructured (randomly-spaced) data on a unit sphere to data values on a rectilinear grid.
csstri	Calculates a Delaunay triangulation of data randomly positioned on the surface of a sphere.
csvoro	Determines Voronoi polygons for data randomly positioned on a sphere and returns vertices for the one surrounding a specified input point.
dsgrid2d	Interpolates double data from an unstructured (randomly-spaced) grid to a rectilinear grid using inverse distance weighted interpolation. (Deprecated version.)
dsgrid2s	Interpolates float data from an unstructured (randomly-spaced) grid to a rectilinear grid using inverse distance weighted interpolation. (Deprecated version.)
dsgrid3d	Interpolates double data from an unstructured (randomly-spaced) grid to a 3D grid using inverse distance weighted interpolation. (Deprecated version.)
dsgrid3s	Interpolates float data from an unstructured (randomly-spaced) grid to a 3D grid using inverse distance weighted interpolation. (Deprecated version.)
dspnt2	Interpolates 2D data at specified points.
dspnt2d	Interpolates 2D data at specified points. (Deprecated version.)
dspnt2s	Interpolates 2D float data at specified points. (Deprecated version.)
dspnt3	Interpolates 3D data at specified points.
dspnt3d	Interpolates 3D double data at specified points. (Deprecated version.)
dspnt3s	Interpolates 3D float data at specified points. (Deprecated version.)
dssetp	Sets parameters for Dsgrid routines.
ftcurv	Calculates an interpolatory spline through a sequence of functional values.
ftcurvd	Calculates the derivatives of an interpolatory spline under tension.
ftcurvi	Calculates integrals of an interpolatory spline under tension between two user-specified limits.
ftcurvp	Calculates an interpolatory spline under tension through a sequence of functional values for a periodic function.
ftcurvpi	Calculates an integral of an interpolatory spline between two specified points.
ftcurvps	Calculates a smoothing spline.
ftcurvs	Calculates a smoothing spline.
ftgetp	Retrieves control parameters for Fitgrid routines.
ftkurv	Calculates an interpolatory spline for parametric curves.
ftkurvd	Calculates an interpolatory spline for parametric curves; it also calculates first and second derivatives of the interpolatory spline.
ftkurvp	Calculates an interpolatory spline under tension through a sequence of points in the plane forming a closed curve.
ftkurvpd	Calculates an interpolatory spline for closed parametric curves; it also calculates first and second derivatives of the interpolatory spline.
ftsetp	Sets control parameters for Fitgrid routines.
ftsurf	Calculates an interpolatory surface passing through a rectangular grid of function values.
natgrid	Interpolates data from an unstructured (randomly-spaced) grid to a rectilinear grid using natural neighbor interpolation.
natgridd	Interpolates double data on an unstructured grid to a rectilinear grid. (Deprecated version.)
natgrids	Interpolates float data on an unstructured grid to a rectilinear grid. (Deprecated version.)
nngetaspectd	Retrieves an aspect at a specified coordinate position.
nngetaspects	Retrieves an aspect at a specified coordinate position.
nngetp	Retrieves control parameters for Natgrid routines.
nngetsloped	Retrieves a slope at a specified coordinate position.
nngetslopes	Retrieves a slope at a specified coordinate position.
nngetwts	Retrieves natural neighbors and weights for the function values at those neighbors.
nngetwtsd	Retrieves natural neighbors and weights for the function values at those neighbors.
nnpnt	Interpolates from 2D random data to get values at a specified set of points.
nnpntd	Interpolates from 2D random double data to get values at a specified set of points. (Deprecated version.)
nnpntend	Terminates interpolation from 2D random data to get values at a specified set of points.
nnpntendd	Terminates interpolation from 2D random data to get values at a specified set of points.
nnpntinit	Initializes internal quantities, for given input data, to allow subsequent nnpnt calls to interpolate at specified points.
nnpntinitd	Initializes internal quantities, for given input data, to allow subsequent nnpntd calls to interpolate at specified points.
nnpntinits	Initializes internal quantities, for given input data, to allow subsequent nnpnts calls to interpolate at specified points.
nnpnts	Interpolates from 2D random float data to get values at a specified set of points. (Deprecated version.)
nnsetp	Sets control parameters for Natgrid routines.
shgetnp	Finds the nearest point, or points (in a specified set of points), to a given point in 3-space.
shgetp	Retrieves control parameters for Shgrid routines.
shgrid	Interpolates data from an unstructured grid to a grid in 3-space.
shsetp	Sets control parameters for Shgrid routines.

Oceanography

depth_to_pres	Convert ocean depth to pressure.
mixed_layer_depth	Calculates a quantity derived from the Potential Density of significance. (Documentation under construction.)
pop_remap	Regrids a POP ocean model grid to another grid.
PopLatLon	Regrids a scalar variable on a POP grid to a lat/lon grid or vice-versa.
PopLatLonV	Converts vectors on a POP grid to a lat/lon grid and vice-versa.
potmp_insitu_ocn	Calculate seawater potential temperature at an arbitrary reference pressure given insitu temperature, salinity and depth.
rho_mwjf	Computes ocean water density given a specified range for potential temperature (deg Celsius) and salinity (psu).

Printing

print	Prints the value of a variable or expression.
printFileVarSummary	Prints a summary of a file variable's information.
printMinMax	Prints the minimum and maximum values of a variable.
printVarSummary	Prints a summary of a variable's information.
show_ascii	Prints the ASCII table to the screen.
write_matrix	Writes nicely-formatted integer, float, or double precision two-dimensional (2D) arrays to standard out or to a file.

Random number generators

generate_2d_array	Generates a "nice" 2D array of pseudo random data, especially for use in 2D graphics.
generate_sample_indices	Generate indices (subscripts) for resampling: with and without replacement.
generate_unique_indices	Generate unique random indices (subscripts).
rand	Generates a pseudo-random number.
random_chi	Generates random numbers using a chi-squared distribution.
random_gamma	Generates random numbers using a gamma distribution.
random_normal	Generates random numbers using a normal distribution.
random_setallseed	Sets initial seeds for random number generators.
random_uniform	Generates random numbers using a uniform range distribution.
srand	Establishes a seed for the rand function.

Regridding

area_conserve_remap	Performs areal conservative remapping from one rectilinear grid to another.
area_conserve_remap_Wrap	Performs areal conservative remapping from one rectilinear grid to another and retains metadata.
area_hi2lores	Interpolates from high resolution rectilinear grids to low resolution recitlinear grids using local area averaging.
area_hi2lores_Wrap	Interpolates from high resolution rectilinear grids to low resolution rectilinear grids using local area averaging and retains metadata.
bin_avg	Calculates gridded binned averages and counts on a rectilinear grid using randomly spaced data.
curvilinear_to_SCRIP	Writes the description of a curvilinear grid to a SCRIP file.
ESMF_regrid	Regrids data from one lat/lon grid to another, using ESMF software.
ESMF_regrid_gen_weights	Writes a weight file using the offline ESMF weight generator.
ESMF_regrid_with_weights	Using the provided weight file, regrids data from one lat/lon grid to another.
f2fosh	Interpolates a scalar quantity from a fixed grid (including pole points) to a fixed-offset grid.
f2fosh_Wrap	Interpolates a scalar quantity from a fixed grid (including pole points) to a fixed-offset grid (retains metadata).
f2foshv	Interpolates a vector quantity on a fixed grid (including pole points) to a fixed-offset grid.
f2foshv_Wrap	Interpolates a vector quantity on a fixed grid (including pole points) to a fixed-offset grid (retains metadata).
f2fsh	Interpolates a scalar quantity from one fixed grid to another.
f2fsh_Wrap	Interpolates a scalar quantity from one fixed grid to another (retains metadata).
f2fshv	Interpolates a vector quantity from one fixed grid to another.
f2fshv_Wrap	Interpolates a vector quantity from one fixed grid to another (retains metadata).
f2gsh	Interpolates a scalar quantity from a fixed grid to a Gaussian grid (with optional truncation).
f2gsh_Wrap	Interpolates a scalar quantity from a fixed grid to a Gaussian grid (with optional truncation) (retains metadata).
f2gshv	Interpolates a vector quantity on a fixed grid to a Gaussian grid (optional truncation).
f2gshv_Wrap	Interpolates a vector quantity on a fixed grid to a Gaussian grid (optional truncation) (retains metadata).
fo2fsh	Interpolates a scalar quantity from a fixed-offset grid to a fixed grid.
fo2fsh_Wrap	Interpolates a scalar quantity from a fixed-offset grid to a fixed grid (retains metadata).
fo2fshv	Interpolates a vector quantity from a fixed-offset grid to a fixed grid.
fo2fshv_Wrap	Interpolates a vector quantity from a fixed-offset grid to a fixed grid (retains metadata).
g2fsh	Interpolates a scalar quantity from a Gaussian grid to a fixed grid.
g2fsh_Wrap	Interpolates a scalar quantity from a Gaussian grid to a fixed grid (retains metadata).
g2fshv	Interpolates a vector quantity from a Gaussian grid to a fixed grid.
g2fshv_Wrap	Interpolates a vector quantity from a Gaussian grid to a fixed grid (retains metadata).
g2gsh	Interpolates a scalar quantity from one Gaussian grid to another (with optional truncation).
g2gsh_Wrap	Interpolates a scalar quantity from one Gaussian grid to another (with optional truncation) (retains metadata).
g2gshv	Interpolates a vector quantity from one Gaussian grid to another (with optional truncation).
g2gshv_Wrap	Interpolates a vector quantity from one Gaussian grid to another (optional truncation) (retains metadata).
latlon_to_SCRIP	Writes the description of a lat/lon grid to a SCRIP file.
linint2	Interpolates from a rectilinear grid to another rectilinear grid using bilinear interpolation.
linint2_points	Interpolates from a rectilinear grid to an unstructured grid or locations using bilinear interpolation.
linint2_points_Wrap	Interpolates from a rectilinear grid to an unstructured grid using bilinear interpolation, and retains metadata.
linint2_Wrap	Interpolates from a rectilinear grid to another rectilinear grid using bilinear interpolation, and retains metadata.
obj_anal_ic	Iterative improvement objective analysis.
obj_anal_ic_deprecated	Iterative correction objective analysis (Cressman, Barnes) (deprecated)
obj_anal_ic_Wrap	Iterative improvement objective analysis and returns meta data.
poisson_grid_fill	Replaces all missing (_FillValue) values in a grid with values derived from solving Poisson's equation via relaxation.
pop_remap	Regrids a POP ocean model grid to another grid.
PopLatLon	Regrids a scalar variable on a POP grid to a lat/lon grid or vice-versa.
PopLatLonV	Converts vectors on a POP grid to a lat/lon grid and vice-versa.
rcm2points	Interpolates data on a curvilinear grid (i.e. RCM, WRF, NARR) to an unstructured grid.
rcm2points_Wrap	Interpolates data on a curvilinear grid (i.e. RCM, WRF, NARR) to an unstructured grid and retains metadata.
rcm2rgrid	Interpolates data on a curvilinear grid (i.e. RCM, WRF, NARR) to a rectilinear grid.
rcm2rgrid_Wrap	Interpolates data on a curvilinear grid (i.e. RCM, WRF, NARR) to a rectilinear grid and retains metadata.
rectilinear_to_SCRIP	Writes the description of a rectilinear grid to a SCRIP file.
rgrid2rcm	Interpolates data on a rectilinear lat/lon grid to a curvilinear grid like those used by the RCM, WRF and NARR models/datasets.
rgrid2rcm_Wrap	Interpolates data on a rectilinear lat/lon grid to a curvilinear grid like those used by the RCM, WRF and NARR models/datasets and retains metadata.
triple2grid	Places unstructured (randomly-spaced) data onto the nearest locations of a rectilinear grid.
triple2grid2d	Places unstructured (randomly-spaced) data onto the nearest locations of a curvilinear grid.
triple2grid_Wrap	Places unstructured (randomly-spaced) data onto the nearest locations of a rectilinear grid and retains metadata.
unstructured_to_ESMF	Writes the description of an unstructured grid to an ESMF file.

RIP

rip_cape_2d	Computes convective available potential energy (CAPE), convective inhibition (CIN), lifted condensation level (LCL), and level of free convection (LFC) (deprecated version).
rip_cape_3d	Computes convective available potential energy (CAPE) and convective inhibition (CIN) (deprecated version).
wrf_cape_2d	Computes maximum convective available potential energy (CAPE), maximum convective inhibition (CIN), lifted condensation level (LCL), and level of free convection (LFC).
wrf_cape_3d	Computes convective available potential energy (CAPE) and convective inhibition (CIN).

Singular value decomposition

dgeevx_lapack	Given a square (N,N) real nonsymmetric matrix, compute the eigenvalues and, optionally, the left and/or right eigenvectors via the LAPACK subroutine dgeevx.
svd_lapack	Calculates the singular value decomposition of a general rectangular matrix.
svdcov	Uses singular value decomposition and returns the left and right homogeneous and heterogeneous arrays associated with the two input datasets.
svdcov_sv	Uses singular value decomposition to return the left and right singular vectors associated with the two input datasets.
svdstd	Uses singular value decomposition and returns the left and right homogeneous and heterogeneous arrays associated with the two input datasets.
svdstd_sv	Uses singular value decomposition to return the left and right singular vectors associated with the two input datasets.

Spherical harmonic routines

dv2uvF	Computes the divergent (irrotational) wind components for a fixed grid via spherical harmonics.
dv2uvf	Computes the divergent (irrotational) wind components for a fixed grid via spherical harmonics.
dv2uvF_Wrap	Computes the divergent (irrotational) wind components for a fixed grid via spherical harmonics and retains metadata.
dv2uvG	Computes the divergent (irrotational) wind components for a gaussian grid via spherical harmonics.
dv2uvg	Computes the divergent (irrotational) wind components for a gaussian grid via spherical harmonics.
dv2uvG_Wrap	Computes the divergent (irrotational) wind components for a gaussian grid via spherical harmonics and retains metadata.
exp_tapersh	Performs tapering (filtering) of the spherical harmonic coefficients.
exp_tapersh_wgts	Calculates weights which can be used to perform tapering (filtering) of spherical harmonic coefficients.
exp_tapershC	Performs tapering (filtering) of the spherical harmonic coefficients.
get_sphere_radius	Retrieves the radius of a sphere used in spherical harmonic routines.
gradsf	Computes the gradient of an array that is on a fixed grid using spherical harmonics.
gradsg	Computes the gradient of an array that is on a gaussian grid using spherical harmonics.
igradsf	Computes a scalar array from its gradient components on a fixed grid using spherical harmonics.
igradsF	Computes a scalar array from its gradient components on a fixed grid using spherical harmonics.
igradsg	Computes a scalar array from its gradient components on a gaussian grid using spherical harmonics.
igradsG	Computes a scalar array from its gradient components on a gaussian grid using spherical harmonics.
ilapsf	Inverts the Laplacian (on a fixed grid) using spherical harmonics.
ilapsF	Inverts the Laplacian (on a fixed grid) using spherical harmonics.
ilapsF_Wrap	Inverts the Laplacian (on a fixed grid) using spherical harmonics and retains metadata.
ilapsg	Inverts the Laplacian (on a gaussian grid) using spherical harmonics.
ilapsG	Inverts the Laplacian (on a gaussian grid) using spherical harmonics.
ilapsG_Wrap	Inverts the Laplacian (on a gaussian grid) using spherical harmonics and retains metadata.
ilapvf	Inverts the vector Laplacian (on a fixed grid) using spherical harmonics.
ilapvg	Inverts the vector Laplacian (on a gaussian grid) using spherical harmonics.
lapsF	Computes the Laplacian using spherical harmonics, given a scalar z on a fixed grid.
lapsf	Computes the Laplacian using spherical harmonics, given a scalar z on a fixed grid.
lapsG	Computes the Laplacian using spherical harmonics, given a scalar z on a gaussian grid.
lapsg	Computes the Laplacian using spherical harmonics, given a scalar z on a gaussian grid.
lapvf	Computes the vector Laplacian using spherical harmonics, given a vector quantity (u,v) on a fixed grid.
lapvg	Computes the vector Laplacian using spherical harmonics, given a vector quantity (u,v) on a gaussian grid.
lderuvf	Computes the latitudinal derivatives using spherical harmonics, given vector components (u,v) on a fixed grid.
lderuvg	Computes the latitudinal derivatives using spherical harmonics, given vector components (u,v) on a gaussian grid.
rhomb_trunc	Performs rhomboidal truncation on spherical harmonic coefficients.
rhomb_trunC	Performs rhomboidal truncation on spherical harmonic coefficients.
set_sphere_radius	Sets the radius of a sphere used in spherical harmonic routines.
sfvp2uvf	Computes the wind components given stream function and velocity potential (on a fixed grid) via spherical harmonics.
sfvp2uvg	Computes the wind components given stream function and velocity potential (on a gaussian grid) via spherical harmonics.
shaeC	Computes spherical harmonic analysis of a scalar field on a fixed grid via spherical harmonics.
shaec	Computes spherical harmonic analysis of a scalar field on a fixed grid via spherical harmonics.
shagC	Computes spherical harmonic analysis of a scalar field on a gaussian grid via spherical harmonics.
shagc	Computes spherical harmonic analysis of a scalar field on a gaussian grid via spherical harmonics.
shsec	Computes spherical harmonic synthesis of a scalar quantity on a fixed grid via spherical harmonics.
shseC	Computes the spherical harmonic synthesis of a scalar quantity on a fixed grid via spherical harmonics.
shsgc	Computes spherical harmonic synthesis of a scalar quantity on a gaussian grid via spherical harmonics.
shsgC	Computes the spherical harmonic synthesis of a scalar quantity on a gaussian grid via spherical harmonics.
shsgc_R42	Computes spherical harmonic synthesis of a scalar quantity via rhomboidally truncated (R42) spherical harmonic coefficients onto a (108x128) gaussian grid.
shsgc_R42_Wrap	Computes spherical harmonic synthesis of a scalar quantity via rhomboidally truncated (R42) spherical harmonic coefficients onto a (108x128) gaussian grid. (creates metadata).
tri_trunC	Performs triangular truncation on spherical harmonic coefficients.
tri_trunc	Performs triangular truncation on spherical harmonic coefficients.
uv2dvf	Computes the divergence using spherical harmonics given the u and v wind components on a fixed grid.
uv2dvF	Computes the divergence using spherical harmonics given the u and v wind components on a fixed grid.
uv2dvF_Wrap	Computes the divergence using spherical harmonics given the u and v wind components on a fixed grid (retains metadata).
uv2dvg	Computes the divergence using spherical harmonics given the u and v wind components on a gaussian grid.
uv2dvG	Computes the divergence using spherical harmonics given the u and v wind components on a gaussian grid.
uv2dvG_Wrap	Computes the divergence using spherical harmonics given the u and v wind components on a gaussian grid (retains metadata).
uv2sfvpF	Computes the stream function and velocity potential via spherical harmonics given u and v on a fixed grid.
uv2sfvpf	Computes the stream function and velocity potential via spherical harmonics given u and v on a fixed grid.
uv2sfvpG	Computes the stream function and velocity potential via spherical harmonics given u and v on a gaussian grid.
uv2sfvpg	Computes the stream function and velocity potential via spherical harmonics given u and v on a gaussian grid.
uv2vrdvF	Computes the vorticity and divergence via spherical harmonics, given the u and v wind components on a fixed grid.
uv2vrdvf	Computes the vorticity and divergence via spherical harmonics, given the u and v wind components on a fixed grid.
uv2vrdvG	Computes the vorticity and divergence via spherical harmonics, given the u and v wind components on a gaussian grid.
uv2vrdvg	Computes the vorticity and divergence via spherical harmonics, given the u and v wind components on a gaussian grid.
uv2vrF	Computes the vorticity via spherical harmonics, given the u and v wind components on a fixed grid.
uv2vrf	Computes the vorticity via spherical harmonics, given the u and v wind components on a fixed grid.
uv2vrF_Wrap	Computes the vorticity via spherical harmonics, given the u and v wind components on a fixed grid (retains metadata).
uv2vrG	Computes the vorticity via spherical harmonics, given the u and v wind components on a gaussian grid.
uv2vrg	Computes the vorticity via spherical harmonics, given the u and v wind components on a gaussian grid.
uv2vrG_Wrap	Computes the vorticity via spherical harmonics, given the u and v wind components on a gaussian grid (retains metadata).
vhaeC	Computes vector spherical harmonic analysis of vector fields on a fixed grid via spherical harmonics.
vhaec	Computes vector spherical harmonic analysis of vector fields on a fixed grid via spherical harmonics.
vhagC	Computes vector spherical harmonic analysis of vector fields on a gaussian grid via spherical harmonics.
vhagc	Computes vector spherical harmonic analysis of vector fields on a gaussian grid via spherical harmonics.
vhseC	Computes vector spherical harmonic syntheses of vector fields on a fixed grid via spherical harmonics.
vhsec	Computes vector spherical harmonic syntheses of vector fields on a fixed grid via spherical harmonics.
vhsgc	Computes vector spherical harmonic syntheses of vector fields on a gaussian grid via spherical harmonics.
vhsgC	Computes vector spherical harmonic syntheses of vector fields on a gaussian grid via spherical harmonics.
vr2uvf	Computes the rotational wind components via spherical harmonics, given an array containing relative vorticity on a fixed grid.
vr2uvF	Computes the rotational wind components via spherical harmonics, given an array containing relative vorticity on a fixed grid.
vr2uvF_Wrap	Computes the rotational wind components via spherical harmonics, given an array containing relative vorticity on a fixed grid (retains metadata).
vr2uvg	Computes the rotational wind components via spherical harmonics, given an array containing relative vorticity on a gaussian grid.
vr2uvG	Computes the rotational wind components via spherical harmonics, given an array containing relative vorticity on a gaussian grid.
vr2uvG_Wrap	Computes the rotational wind components via spherical harmonics, given an array containing relative vorticity on a gaussian grid (retains metadata).
vrdv2uvf	Computes the wind components via spherical harmonics, given vorticity and divergence on a fixed grid.
vrdv2uvF	Computes the wind components via spherical harmonics, given vorticity and divergence on a fixed grid.
vrdv2uvg	Computes the wind components via spherical harmonics, given vorticity and divergence on a gaussian grid.
vrdv2uvG	Computes the wind components via spherical harmonics, given vorticity and divergence on a gaussian grid.

Statistics

avg	Computes the average of a variable regardless of dimensionality.
betainc	Evaluates the incomplete beta function.
bin_avg	Calculates gridded binned averages and counts on a rectilinear grid using randomly spaced data.
bin_sum	Calculates binned sums and counts over multiple invocations of the procedure on a rectilinear grid.
bootstrap_correl	Bootstrap estimates of sample cross correlations (ie, Pearson's correlation coefficient) between two variables.
bootstrap_diff	Bootstrap mean differences from two samples.
bootstrap_estimate	Extract the user specified element from the bootstrapped values.
bootstrap_regcoef	Bootstrap estimates of linear regression coefficient.
bootstrap_stat	Bootstrap estimates of a user specified statistic derived from a variable.
ceemdan	Complete Ensemble Empirical Mode Decomposition with Adaptive Noise.
cohsq_c2p	Given coherence-squared and the effective degrees-of-freedom, calculate the associated probability.
cohsq_p2c	Calculate the value(s) of coherence-squared required for a specified significance level and effectiove degrees-of-freedom.
dim_acumrun_n	Calculates individual accumulated sums of sequences ('runs') of a specified length.
dim_avg	Computes the average of a variable's rightmost dimension at all other dimensions.
dim_avg_n	Computes the average of a variable's given dimension(s) at all other dimensions.
dim_avg_n_Wrap	Computes the average of a variable's given dimensions at all other dimensions and retains metadata.
dim_avg_wgt	Computes the weighted average of a variable's rightmost dimension at all other dimensions.
dim_avg_wgt_n	Computes the weighted average of a variable's given dimension at all other dimensions.
dim_avg_wgt_n_Wrap	Computes the weighted average of a variable's given dimension at all other dimensions and retains metadata.
dim_avg_wgt_Wrap	Computes the weighted average of a variable's rightmost dimension at all other dimensions and retains metadata.
dim_avg_Wrap	Computes the average of a variable's rightmost dimension at all other dimensions and retains metadata.
dim_cumsum	Calculates the cumulative sum along the rightmost dimension.
dim_cumsum_n	Calculates the cumulative sum along the given dimension(s).
dim_cumsum_n_Wrap	Calculates the cumulative sum along the given dimension(s) and retains metadata.
dim_cumsum_Wrap	Calculates the cumulative sum along the rightmost dimension and retains metadata.
dim_gamfit_n	Fit data to the two parameter gamma distribution.
dim_max	Finds the maximum of a variable's rightmost dimension at all other dimensions.
dim_max_n	Finds the maximum of a variable's given dimensions at all other dimensions.
dim_max_n_Wrap	Computes the maximum of a variable's given dimensions at all other dimensions and retains metadata.
dim_median	Computes the median of a variable's rightmost dimension at all other dimensions.
dim_median_n	Computes the median of a variable's given dimensions at all other dimensions.
dim_min	Finds the minimum of a variable's rightmost dimension at all other dimensions.
dim_min_n	Finds the minimum of a variable's given dimensions at all other dimensions.
dim_min_n_Wrap	Computes the minimum of a variable's given dimensions at all other dimensions and retains metadata.
dim_numrun_n	Counts the number of "runs" (sequences) within a series containing zeros and ones.
dim_rmsd	Computes the root-mean-square-difference between two variables' rightmost dimension at all other dimensions.
dim_rmsd_n	Computes the root-mean-square-difference between two variables' given dimensions at all other dimensions.
dim_rmsd_n_Wrap	Computes the root-mean-square-difference between two variables' given dimensions at all other dimensions.
dim_rmsd_Wrap	Computes the root-mean-square-difference between two variables' rightmost dimension at all other dimensions.
dim_rmvmean	Calculates and removes the mean of the (rightmost) dimension at all other dimensions.
dim_rmvmean_n	Calculates and removes the mean of the given dimension(s) at all other dimensions.
dim_rmvmean_n_Wrap	Calculates and removes the mean of the given dimensions at all other dimensions and retains metadata.
dim_rmvmean_Wrap	Calculates and removes the mean of the (rightmost) dimension at all other dimensions and retains metadata.
dim_rmvmed	Calculates and removes the median of the (rightmost) dimension at all other dimensions.
dim_rmvmed_n	Calculates and removes the median of the given dimension(s) at all other dimensions.
dim_rmvmed_n_Wrap	Calculates and removes the median of the given dimensions at all other dimensions and retains metadata.
dim_rmvmed_Wrap	Calculates and removes the median of the (rightmost) dimension at all other dimensions and retains metadata.
dim_standardize	Calculates standardized anomalies of the rightmost dimension at all other dimensions.
dim_standardize_n	Calculates standardized anomalies of the given dimension(s) at all other dimensions.
dim_standardize_n_Wrap	Calculates standardized anomalies of the given dimensions at all other dimensions and retains metadata.
dim_standardize_Wrap	Calculates standardized anomalies of the rightmost dimension at all other dimensions and retains metadata.
dim_stat4	Computes the first four moments (average, sample variance, skewness, and kurtosis) of the rightmost dimension for all other dimensions.
dim_stat4_n	Computes the first four moments (average, sample variance, skewness, and kurtosis) of the given dimension(s) for all other dimensions.
dim_stddev	Computes the sample standard deviation of a variable's rightmost dimension at all other dimensions.
dim_stddev_n	Computes the sample standard deviation of a variable's given dimension(s) at all other dimensions.
dim_stddev_n_Wrap	Computes the sample standard deviation of a variable's given dimension(s) at all other dimensions and retains metadata.
dim_stddev_Wrap	Computes the sample standard deviation of a variable's rightmost dimension at all other dimensions and retains metadata.
dim_sum_wgt_n_Wrap	Computes the weighted sum of a variable's given dimension at all other dimensions and retains metadata.
dim_sum_wgt_Wrap	Computes the weighted sum of a variable's rightmost dimension at all other dimensions and retains metadata.
dim_variance	Computes the unbiased estimates of the variance of a variable's rightmost dimension.
dim_variance_n	Computes the unbiased estimates of the variance of a variable's given dimension(s) at all other dimensions.
dim_variance_n_Wrap	Computes unbiased estimates of the variance of a variable's given dimension(s) at all other dimensions and retains metadata.
dim_variance_Wrap	Computes unbiased estimates of the variance of a variable's rightmost dimension at all other dimensions and retains metadata.
dtrend	Estimates and removes the least squares linear trend of the rightmost dimension from all grid points.
dtrend_msg	Estimates and removes the least squares linear trend of the rightmost dimension from all grid points (missing values allowed).
dtrend_msg_n	Estimates and removes the least squares linear trend of the dim-th dimension from all grid points (missing values allowed).
dtrend_n	Estimates and removes the least squares linear trend of the given dimension from all grid points.
dtrend_quadratic	Estimates and removes the least squares quadratic trend of the rightmost dimension from all grid points.
dtrend_quadratic_msg_n	Estimates and removes the least squares quadratic trend of the dim-th dimension from all grid points (missing values allowed).
eemd	Perform ensemble empirical mode decomposition (EEMD).
equiv_sample_size	Estimates the number of independent values in a series of correlated values.
esccr	Computes sample cross-correlations.
esccv	Computes sample cross-covariances.
escorc	Computes the (Pearson) sample linear cross-correlations at lag 0 only.
escorc_n	Computes the (Pearson) sample linear cross-correlations at lag 0 only, across the specified dimensions.
escovc	Computes sample cross-covariances at lag 0 only.
exponential_curve_fit	Calculates the coefficients for a simple exponential curve fit of the form ' y = A*exp(B*x)' using least squares.
extval_frechet	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Frechet Type II distribution given the shape, scale and location parameters.
extval_gev	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Generalized Extreme Value (GEV) distribution given the shape, scale and location parameters.
extval_gumbel	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Gumbel (Type I) distribution function given the scale and location parameters.
extval_mlegam	Estimates the location, shape, scale and other parameters for the Gamma distribution using maximum-likelihood estimation (MLE).
extval_mlegev	Estimates the shape, scale and location parameters for the Generalized Extreme-Value (GEV) distribution using Maximum-Likelihood Estimation (MLE).
extval_pareto	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Pareto distributions (Generalized, Type I, TYpe II) given the shape, scale and location parameters.
extval_recurrence_table	Calculates the recurrence interval (return period), cumulative and exceedence probabilities based upon a time series.
extval_return_period	Calculates the period of an event (eg, flood, heat wave, drought) occurring given an average event recurrence interval and specified probability level.
extval_return_prob	Calculates the probability of an event (eg, flood, heat wave, drought) given an average event interval and a specified exceedance period.
extval_weibull	Calculates the probability (PDF) and cumulative (CDF) distribution functions of the Weibull Type III distribution given the shape, scale and location parameters.
ftest	Applies F-test for variances and returns an estimate of the statistical significance.
genNormalDist	Generates a normal distribution.
kde_n_test	Uses gaussian kernel density estimation (KDE) to estimate the probability density function of a random variable. This function is under construction and is available for testing only. It may not be released with NCL V6.5.0.
kmeans_as136	Performs k-means clustering via the Hartigan and Wong AS-136 algorithm.
kolsm2_n	Uses the Kolmogorov-Smirnov two-sample test to determine if two samples are from the same distribution.
max	Computes the maximum value of a multi-dimensional array.
min	Computes the minimum value of a multi-dimensional array.
pattern_cor	Compute centered or uncentered pattern correlation.
pdfxy	Generates a joint probability density distribution. (Please use pdfxy_conform.)
pdfxy_bin	Performs looping necessary to calculate the bivariate (joint) probability distribution (see pdfxy).
pdfxy_conform	An interface to pdfxy that allows the input arrays to be different sizes.
regcoef	Calculates the linear regression coefficient between two variables.
regCoef	Calculates the linear regression coefficient between two variables.
regCoef_n	Calculates the linear regression coefficient between two variables on the given dimensions.
regline	Calculates the linear regression coefficient between two series.
regline_weight	Calculates the linear regression coefficient between two series where one variable is weighted by some measure of uncertainty.
spcorr	Computes Spearman rank order correlation (Rho) correlation coefficient.
spcorr_n	Computes Spearman rank order correlation (Rho) correlation coefficient across the given dimension.
stat2	Calculates the first two moments of the given input.
stat4	Calculates estimates of the first four moments (mean, variance, skewness, and kurtosis) of the given input.
stat_dispersion	Computes a number of robust statistics.
stat_medrng	Calculates median, range, and mid-range of the given input.
stat_trim	Calculates trimmed estimates of the first two moments of the given input.
stddev	Calculates the sample standard deviation.
student_t	Calculates the two-tailed probability of the Student-t distribution.
taylor_stats	Calculates statistics needed for the Taylor Diagram: pattern_correlation, ratio and bias.
trend_manken	Calculates Mann-Kendall non-parametric test for monotonic trend and the Theil-Sen robust estimate of linear trend.
ttest	Returns an estimate of the statistical significance and, optionally, the t-values.
unwrap_phase	Unwrap (correct) phase angles to produce smoother phase plots.
variance	Computes an unbiased estimate the variance of all input points.
weibull	Derives the shape and scale parameters for the Weibull distribution via maximum likelihood estimates.
zscore	Computes the zscore of a variable's given dimensions at all other dimensions and retains metadata.

String manipulators

changeCase	Changes the case of a string. (Deprecated: see str_lower/str_upper.)
changeCaseChar	Changes the case of each character in a string. (Deprecated: see str_switch.)
charactertostring	Coerces values of type character to values of type string (deprecated; use tostring).
chartostring	Coerces values of type character to values of type string (deprecated; use tostring).
cla_sq	Create a string that uses single quotes (sq) to enclose command line assignment (CLA) statements for later use by NCL's system procedure.
get_file_suffix	Extract the suffix associated with a file name.
indStrSubset	Returns the indices corresponding to the location of the substring, if it is a subset of the other given string. (Deprecated: see str_index_of_substr.)
is_string_numeric	Returns True for every element of the input string array that contains a numeric value.
isStrSubset	Return True or False if one string is a subset of another string.
keyword_values	Read a text file that contains keywords and one-or-more values (similar to fortran NAMELIST).
oneDtostring	Converts a 1-dimensional array to a single string.
print_table	Prints formatted elements from a list to stdout.
replaceSingleChar	Within a string replace one character with another character. (Deprecated: see str_sub_str.)
sprintf	Converts floats or doubles into formatted strings.
sprinti	Converts integers into formatted strings.
str_capital	Capitalizes all words in each string.
str_concat	Concatenates all strings into a single string.
str_fields_count	Counts the number of fields separated by the given delimiters in an array of strings.
str_get_cols	Returns an array of substrings, given a start and end index into the given string.
str_get_dq	Returns the double quote (") character as a string.
str_get_field	Returns an array of substrings given a field number and a combination of delimiters.
str_get_nl	Returns the newline (\n) character as a string.
str_get_sq	Returns the single quote (') character as a string.
str_get_tab	Returns the tab ('\t' in C) character as a string.
str_index_of_substr	Returns the start indexes where one or more occurrences of a substring is found in a string.
str_insert	Inserts a substring into the given strings.
str_is_blank	Returns True for strings that contain all blanks.
str_join	Joins all strings into one string, with each string separated by delimiter.
str_left_strip	Strips leading spaces and TABs from the input strings.
str_lower	Converts all input strings to lowercase.
str_match	Returns a list of strings that contain the given substring (case sensitive).
str_match_bool	Returns a logical array of True/False/Missing indicating where the input array of strings contain the given substring (case sensitive).
str_match_bool_ic	Returns a logical array of True/False/Missing indicating where the input array of strings contain the given substring (case insensitive).
str_match_ic	Returns a list of strings that contain the given substring (case insensitive).
str_match_ic_regex	Returns a list of strings that contain the given substring (case insensitive), allowing for regular expressions.
str_match_ind	Returns a list of indexes into an array of strings that contain the given substring (case sensitive).
str_match_ind_ic	Returns a list of indexes into an array of strings that contain the given substring (case insensitive).
str_match_ind_ic_regex	Returns a list of indexes into an array of strings that contain the given substring (case insensitive), allowing for regular expressions.
str_match_ind_regex	Returns a list of indexes into an array of strings that contain the given substring (case sensitive), allowing for regular expressions.
str_match_regex	Returns a list of strings that contain the given substring (case sensitive), allowing for regular expressions.
str_right_strip	Strips ending spaces and TABs from the input strings.
str_split	Splits a string into an array of strings given one or more delimiters.
str_split_by_length	Splits a string or strings into an array of strings given a length, or an array of lengths.
str_split_csv	Splits strings into an array of strings using the given delimiter.
str_squeeze	Strips off leading and ending spaces and TABs, and replaces multiple spaces and/or TABs with a single space.
str_strip	Strips leading and ending spaces and TABs from the input strings.
str_sub_str	Replaces a substring with a new substring.
str_switch	Switches the case of characters in the given string(s).
str_upper	Converts all input strings to uppercase.
stringtochar	Coerces values of type string to values of type character.
stringtocharacter	Coerces values of type string to values of type character.
stringtodouble	Coerces values of type string to values of type double.
stringtofloat	Coerces values of type string to values of type float.
stringtoint	Coerces values of type string to values of type integer.
stringtointeger	Coerces values of type string to values of type integer.
stringtolong	Coerces values of type string to values of type long.
stringtoshort	Coerces values of type string to values of type short.
strlen	Returns the length of a string variable.
unique_string	Returns a unique string given the input string as a prefix.
write_table	Writes formatted elements from a list to an ASCII file.

System tools

echo_off	Disables echoing of NCL statements as they are encountered.
echo_on	Enables echoing of NCL statements as they are encountered.
exit	Forces an NCL script to exit immediately.
fileexists	Checks for existence of any UNIX file.
get_cpu_time	Returns the CPU time used by NCL.
get_ncl_version	Returns the current NCL version.
get_script_name	Returns the name of a script of commands provided to NCL for execution.
get_script_prefix_name	Returns the name of a script of commands provided to NCL for execution, if provided, with any script name tag removed.
getenv	Returns the string value of a shell environment variable.
isbigendian	Returns True if you are running NCL on a big endian machine.
isfilepresent	Checks if a supported file exists.
loadscript	Loads the given NCL script.
ncargpath	Returns the absolute pathnames of various NCAR Graphics directories.
ncargversion	Prints the NCAR Graphics version, copyright, trademark and general licensing terms.
print_clock	Prints the given string along with a current timestamp.
sleep	Pauses execution of NCL scripts for a specified number of seconds.
status_exit	Exits an NCL script passing a status code to the calling environment.
subprocess	Executes a shell command as a concurrent subprocess to NCL.
subprocess_wait	Checks the finish-status of a concurrent process launched by the subprocess command. Can optionally wait for the subprocess to finish.
system	Executes a shell command.
systemfunc	Executes a shell command and returns the output.
unique_string	Returns a unique string given the input string as a prefix.
wallClockElapseTime	Calculates and prints elapsed 'wall clock' time.

Type converters

byte2flt	Converts values of type byte to values of type float.
byte2flt_hdf	Converts values of type byte to values of type float using the "scale" and "offset" attributes (if present).
charactertodouble	Coerces values of type character to values of type double (deprecated; use todouble).
charactertofloat	Coerces values of type character to values of type float (deprecated; use tofloat).
charactertointeger	Coerces values of type character to values of type integer (deprecated; use tointeger).
charactertolong	Coerces values of type character to values of NCL type long (deprecated; use tolong).
charactertoshort	Coerces values of type character to values of type short (deprecated; use toshort).
charactertostring	Coerces values of type character to values of type string (deprecated; use tostring).
chartodouble	Coerces values of type character to values of type double (deprecated; use todouble).
chartofloat	Coerces values of type character to values of type float (deprecated; use tofloat).
chartoint	Coerces values of type character to values of type integer (deprecated; use toint).
chartointeger	Coerces values of type character to values of type integer (deprecated; use tointeger).
chartolong	Coerces values of type character to values of NCL type long (deprecated; use tolong).
chartoshort	Coerces values of type character to values of type short (deprecated; use toshort).
chartostring	Coerces values of type character to values of type string (deprecated; use tostring).
cshstringtolist	Converts a comma delimited string from csh and breaks it up into separate strings.
datatondc	Converts data units into normalized device coordinates (NDCs).
dble2flt	Converts values of type double to values of type float and preserves metadata.
doubletobyte	Coerces values of type double to values of type byte (deprecated; use tobyte).
doubletochar	Coerces values of type double to values of type character (deprecated; use tochar).
doubletocharacter	Coerces values of type double to values of type character (deprecated; use tochar).
doubletofloat	Coerces values of type double to values of type float (deprecated; use tofloat).
doubletoint	Coerces values of type double to values of type integer (deprecated; use toint).
doubletointeger	Coerces values of type double to values of type integer (deprecated; use tointeger).
doubletolong	Coerces values of type double to values of type long (deprecated; use tolong).
doubletoshort	Coerces values of type double to values of type short (deprecated; use toshort).
floattobyte	Coerces values of type float to values of type byte.
floattochar	Coerces values of type float to values of type character.
floattocharacter	Coerces values of type float to values of type character.
floattoint	Coerces values of type float to values of type integer.
floattointeger	Coerces values of type float to values of type integer.
floattolong	Coerces values of type float to values of type long.
floattoshort	Coerces values of type float to values of type short.
flt2dble	Converts values of type float to values of type double and preserves metadata.
flt2string	Converts values of type float to values of type string.
int2dble	Converts values of type integer to values of type float and preserves metadata.
int2flt	Converts values of type integer to values of type float and preserves metadata.
integertobyte	Coerces values of type integer to values of type byte.
integertochar	Coerces values of type integer to values of type character.
integertocharacter	Coerces values of type integer to values of type character.
integertoshort	Coerces values of type integer to values of type short.
inttobyte	Coerces values of type integer to values of type byte.
inttochar	Coerces values of type integer to values of type character.
inttoshort	Coerces values of type integer to values of type short.
longtobyte	Coerces values of type long to values of type byte.
longtochar	Coerces values of type long to values of type character.
longtocharacter	Coerces values of type long to values of type character.
longtoint	Coerces values of type long to values of type integer.
longtointeger	Coerces values of type long to values of type integer.
longtoshort	Coerces values of type long to values of type short.
ndctodata	Converts normalized device coordinates (NDCs) into data coordinates.
NhlDataToNDC	Converts data units into normalized device coordinates (NDCs).
NhlNDCToData	Converts normalized device coordinates (NDCs) into data coordinates.
numeric2int	Converts values of any numeric type to type integer.
pack_values	Compress values of type float or double to values of type short or byte.
short2flt	Converts values of type short to values of type float using the "scale" and "offset" attributes (if present).
short2flt_hdf	Converts values of type short to values of type float using the "scale" and "offset" attributes (if present).
shorttobyte	Coerces values of type short to values of type byte.
shorttochar	Coerces values of type short to values of type character.
shorttocharacter	Coerces values of type short to values of type character.
stringtochar	Coerces values of type string to values of type character.
stringtocharacter	Coerces values of type string to values of type character.
stringtodouble	Coerces values of type string to values of type double.
stringtofloat	Coerces values of type string to values of type float.
stringtoint	Coerces values of type string to values of type integer.
stringtointeger	Coerces values of type string to values of type integer.
stringtolong	Coerces values of type string to values of type long.
stringtoshort	Coerces values of type string to values of type short.
tobyte	Converts values of any snumeric data type or string to values of type (NCL) byte (unsigned char).
tochar	Converts values of any snumeric data type or string to values of type char.
todouble	Converts values of any snumeric data type or string to values of type double.
tofloat	Converts values of any snumeric data type or string to values of type float.
toint	Converts values of any snumeric data type or string to values of type integer.
toint64	Converts values of any snumeric data type or string to values of type int64 (64 bit long, or long long).
tointeger	Converts values of any snumeric data type or string to values of type integer.
tolong	Converts values of any snumeric data type or string to values of type long.
toshort	Converts values of any snumeric data type or string to values of type short.
tosigned	Converts any kind of 8/16/32/64 integers to its corresponding signed integers.
tostring	Converts values of any snumeric data type to values of type string.
tostring_with_format	Converts values of any snumeric data type to values of type string, with specified format.
totype	Converts values of any snumeric data type or string to values of the given type.
toubyte	Converts values of any snumeric data type or string to values of type unsigned byte.
touint	Converts values of any snumeric data type or string to values of type unsigned integer.
touint64	Converts values of any snumeric data type or string to values of type uint64 (unsigned 64 bit long, or unsigned long long).
toulong	Converts values of any snumeric data type or string to values of type unsigned long.
tounsigned	Converts any kind of 8/16/32/64 integers to its corresponding unsigned integers.
toushort	Converts values of any snumeric data type or string to values of type unsigned short.
ushorttoint	Coerces values of type unsigned short to values of type integer.

Unclassified routines

demod_cmplx	Perform a complex demodulation on a time series.
isconform	Check two variables for array conformance (same shape and size).
regline_stats	Performs simple linear regression including confidence estimates, an ANOVA table and 95% mean response estimates.
rtest	Determines the statistical significance of a linear correlation coefficient.

Variable manipulators

array_append_record	Attaches [appends] additional records [leftmost dimension] to a previously existing array.
delete	Deletes variables, attributes, and coordinate variables.
merge_levels_sfc	Merges a multiple level variable with the corresponding surface variable.
new	Creates an NCL variable.
replace_ieeenan	Changes all occurrences of IEEE NaN to a user-specified value.
rm_single_dims	Removes (squeezes) singleton (degenerate) dimensions from an array while preserving metadata.
scale_values	Scale the values of an array to a user specified range.
table_attach_columns	Attaches [appends] additional columns to a previously existing two-dimensional array.
table_attach_rows	Attaches [appends] additional rows to a previously existing two-dimensional array.
undef	Undefines defined NCL symbols (functions, procedures, variables).

Variable query

is_string_numeric	Returns True for every element of the input string array that contains a numeric value.
isbyte	Returns True if input is of type byte.
ischar	Returns True if input is of type char.
isdefined	Returns True for every element of the input that is a defined keyword, variable, or function/procedure name.
isdouble	Returns True if input is of type double.
isenumeric	Returns True if input is of type enumeric.
isfloat	Returns True if input is of type float.
isfunc	Returns True for every element of the input that is a defined function.
isgraphic	Returns True if input is of type graphic.
isint	Returns True if input is of type integer.
isint64	Returns True if input is of type int64.
isinteger	Returns True if input is of type integer.
islogical	Returns True if input is of type logical.
islong	Returns True if input is of type long.
isnan_ieee	Returns a logical array indicating which input values contain an IEEE NaN.
isnumeric	Returns True if input is of type numeric.
isproc	Returns True for every element of the input that is a defined procedure.
isshort	Returns True if input is of type short.
issnumeric	Returns True if input is of type snumeric.
isstring	Returns True if input is of type string.
isubyte	Returns True if input is of type unsigned byte (ubyte).
isuint	Returns True if input is of type unsigned integer (uint).
isuint64	Returns True if input is of type unsigned 64-bit integer (uint64).
isulong	Returns True if input is of type unsigned long (ulong).
isunsigned	Returns True if input is one of the unsigned types.
isushort	Returns True if input is of type unsigned short (ushort).
isvar	Returns True for every element of the input that is a defined variable.
list_procfuncs	Lists all of the currently defined NCL functions and procedures and their argument lists.
list_vars	Lists the currently defined variables that do not reference files or HLU objects.
sizeof	Returns the total size, in bytes, of the input variable.
typeof	Returns the string name of the type of the input variable.

Workstation routines

clear	Clears the given workstation objects.
frame	Updates and clears the given workstation objects.
NhlChangeWorkstation	Changes the output workstation of one or more NCL View objects.
NhlClearWorkstation	Clears the given workstation objects.
NhlFrame	Updates and clears the given workstation objects.
NhlGetParentWorkstation	Returns the ids of the parent workstations of the given objects.
NhlIsWorkstation	Returns True for each given object that is a Workstation object.
NhlUpdateWorkstation	Updates the given workstation objects.
update	Updates the given workstation objects.

WRF

wrf_avo	Calculates absolute vorticity from WRF model output.
wrf_cape_2d	Computes maximum convective available potential energy (CAPE), maximum convective inhibition (CIN), lifted condensation level (LCL), and level of free convection (LFC).
wrf_cape_3d	Computes convective available potential energy (CAPE) and convective inhibition (CIN).
wrf_contour	Creates a contour plot from ARW WRF model output.
wrf_dbz	Calculates simulated equivalent radar reflectivity factor [dBZ] from WRF model output.
wrf_eth	Calculates equivalent potential temperature from WRF model output.
wrf_helicity	Calculates storm relative helicity from WRF model output.
wrf_ij_to_ll	Finds the nearest longitude, latitude locations to the specified model grid indices (i,j) (deprecated).
wrf_interp_1d	Linearly interpolates a one-dimensional variable in the vertical.
wrf_interp_2d_xy	Extracts a cross section from a given input field.
wrf_interp_3d_z	Interpolates to a specified pressure/height level.
wrf_latlon_to_ij	Finds the nearest model grid indices (i,j) to the specific location(s) in latitude and longitude (deprecated).
wrf_ll_to_ij	Finds the nearest model grid indices (i,j) to the specified location(s) in longitude and latitude (deprecated).
wrf_map	Creates a map background for ARW WRF model data.
wrf_map_overlay	Overlays WRF plot(s) on a WRF-ARW map background (deprecated).
wrf_map_overlays	Overlays contour and vector plots on a WRF-ARW map background.
wrf_map_resources	Sets map plotting resources based on an input WRF-ARW file.
wrf_map_zoom	Zooms into a portion of the ARW WRF model domain, and creates a map background (deprecated).
wrf_mapres_c	Sets the appropriate geographical mapping resources based upon WRF file contents. (deprecated)
wrf_omega	Calculates approximate omega in C, given vertical velocity, water vapor mixing ratio, temperature, and pressure from WRF model output.
wrf_overlay	Overlays multiple plots created from other WRF-ARW plot functions (deprecated).
wrf_overlays	Overlays multiple plots, created from other ARW WRF plot functions.
wrf_pvo	Calculates potential vorticity from WRF model output.
wrf_rh	Calculates relative humidity from ARW WRF model output.
wrf_slp	Calculates sea level pressure from ARW WRF model output.
wrf_smooth_2d	Smooths a given field.
wrf_td	Calculates dewpoint temperature in [C] from ARW WRF model output.
wrf_times_c	Converts WRF variable "Times" which is of type character to user specified numeric units.
wrf_tk	Calculates temperature in [K] from ARW WRF model output.
wrf_updraft_helicity	Calculates updraft helicity from WRF model output.
wrf_user_getvar	Extracts data from ARW WRF model output, and does basic diagnostics calculations.
wrf_user_ij_to_ll	Finds the nearest longitude, latitude locations to the specified WRF-ARW model grid indexes (deprecated).
wrf_user_interp_level	Interpolates a horizontal slice from a three-dimensional WRF-ARW field at the given vertical level(s).
wrf_user_interp_line	Interpolates a two-dimensional WRF-ARW field along a line.
wrf_user_intrp2d	Interpolates ARW WRF 2D model data along a given line (deprecated).
wrf_user_intrp3d	Interpolates ARW WRF model data vertically or horizontally (deprecated).
wrf_user_latlon_to_ij	Finds the nearest WRF-ARW model grid indexes (i,j) to the specific location (deprecated).
wrf_user_list_times	Extracts the list of available times in the ARW WRF model output.
wrf_user_ll_to_ij	Finds the nearest WRF-ARW model grid indexes (i,j) to the requested longitude and latitude locations (deprecated).
wrf_user_ll_to_xy	Finds the nearest WRF-ARW model grid indexes (0-based) that are the closest to the requested longitude and latitude locations.
wrf_user_unstagger	Unstaggers an input variable along a specified dimension.
wrf_user_vert_cross	Interpolates a vertical cross-section from a three-dimensional WRF-ARW field at the given vertical level(s).
wrf_user_vert_interp	Vertically interpolates ARW WRF variables given the type of surface and a set of new levels.
wrf_user_xy_to_ll	Finds the nearest longitude, latitude locations to the specified WRF-ARW model grid indexes.
wrf_uvmet	Rotates u,v components of the wind to earth coordinates.
wrf_vector	Creates a vector plot from ARW WRF model output.
wrf_virtual_temp	Calculates virtual temperature, given temperature and mixing ratio from WRF model output.
wrf_wetbulb	Calculates wet bulb temperature in K, given pressure in temperature in K and mixing ratio in kg/kg from WRF model output.
wrf_wps_close_int	Closes a currently open WPS intermediate file.
wrf_wps_open_int	Opens a WPS intermediate file and returns a status.
wrf_wps_rddata_int	Reads a 2D field from an open WPS intermediate file.
wrf_wps_rdhead_int	Reads header information for the current field of an open WPS intermediate file.
wrf_wps_read_int	Reads data from a WPS intermediate file.
wrf_wps_write_int	Writes data to a WPS intermediate file.