Alphabetical listing of NCL Functions

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

abs	Returns the absolute value of numeric data.
acos	Computes the inverse cosine of numeric types.
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.
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.
all	Returns True if all the elements of the input evaluate as True.
angmom_atm	Calculates the atmosphere's relative angular momentum.
any	Returns True if any of the values of its input evaluate as True.
area_hi2lores	Interpolates from high resolution grids to low resolution grids using local area averaging.
areaint2	Interpolates from one grid to another grid using local area averaging.
array_append_record	Attaches [appends] additional records [leftmost dimension] to a previously existing array.
asciiread	Reads a file that contains ASCII representations of basic data types.
asciiwrite	Creates an ascii text file of numeric or string data type.
asin	Computes the inverse sine of numeric types.
assignFillValue	Transfers the _FillValue attribute from one variable to another.
atan	Computes the inverse tangent of numeric types.
atan2	Computes the inverse tangent of (y/x) for numeric types.
attsetvalues	Applies resources to the given objects.
avg	Computes the average of a variable regardless of dimensionality.
betainc	Evaluates the incomplete beta function.
boxplot	Creates and draws a boxplot.
byte2flt	Converts values of type byte to values of type float.
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.
cancor	Performs canonical correlation analysis between two sets of variables.
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.
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 intergral of a cumulative chi-square distribution function.
cdfchi_x	Calculates the upper limit of intergration 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 intergration 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.
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.
ceil	Computes the smallest integer value larger than the input.
center_finite_diff	Performs a centered finite difference operation on the rightmost 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.
changeCase	Changes the case of a string.
changeCaseChar	Changes the case of each character in a string.
charactertodouble	Coerces values of type character to values of type double.
charactertofloat	Coerces values of type character to values of type float.
charactertointeger	Coerces values of type character to values of type integer.
charactertolong	Coerces values of type character to values of NCL type long.
charactertoshort	Coerces values of type character to values of type short.
charactertostring	Coerces values of type character to values of type string.
chartodouble	Coerces values of type character to values of type double.
chartofloat	Coerces values of type character to values of type float.
chartoint	Coerces values of type character to values of type integer.
chartointeger	Coerces values of type character to values of type integer.
chartolong	Coerces values of type character to values of NCL type long.
chartoshort	Coerces values of type character to values of type short.
chartostring	Coerces values of type character to values of type string.
chiinv	Evaluates the inverse chi-squared distribution function.
clear	Clears the given workstation objects.
clmDayTLL	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
closest_val	Finds the index value in a monotonically increasing one dimensional array closest to a desired value.
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. (Superceded by gsn_contour_shade as of version 4.3.0.)
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.
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).
cos	Computes the cosine of numeric types.
cosh	Computes the hyperbolic cosine of numeric types.
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.
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.
cshstringtolist	Converts a comma delimited string from csh and breaks it up into separate strings.
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 randomly spaced data on a unit sphere to data values on a uniform grid.
cssgrid_Wrap	Uses tension splines to interpolate randomly spaced data on a unit sphere to data values on a uniform 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.
cumsum	Calculates the cumulative sum.
cz2ccm	Computes geopotential height in hybrid coordinates.
datatondc	Converts data units into normalized device coordinates (NDCs).
day_of_week	Calculates the day of the week given month, day, and year.
day_of_year	Calculates the day of the year given month, day, and year.
days_in_month	Calculates the number of days in a month given month, day, and year.
dble2flt	Converts values of type double to values of type float and preserves metadata.
decimalPlaces	Truncates or rounds to the number of decimal places specified
delete	Deletes variables, attributes, and coordinate variables.
delete_VarAtts	Deletes one or more attributes associated with a variable.
destroy	Destroys objects from NCL.
dewtemp_trh	Calculates the dew point temperature given temperature and relative humidity.
dim_avg	Computes the average of a variable's rightmost dimension at all other dimensions.
dim_avg_wgt	Computes the weighted average of a variable's rightmost dimension at all other dimensions.
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_Wrap	Calculates the cumulative sum along the rightmost dimension and retains meta data.
dim_gbits	Unpacks bit chunks from the rightmost dimension of the input array.
dim_max	Finds the maximum of a variable's rightmost dimension at all other dimensions.
dim_median	Computes the median of a variable's rightmost dimension at all other dimensions.
dim_min	Finds the minimum of a variable's rightmost dimension at all other dimensions.
dim_num	Calculates the number of True values of a variable's rightmost dimension at all other dimensions.
dim_pqsort	Computes the permutation vector generated by sorting the n - 1th (rightmost) dimension.
dim_product	Computes the product of a variable's rightmost dimension at all other dimensions.
dim_rmsd	Computes the root-mean-square-difference between two variables' rightmost dimension 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_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_standardize	Calculates standardized anomalies of the rightmost dimension at all other dimensions.
dim_standardize_Wrap	Calculates standardized anomalies of the rightmost dimension at all other dimensions.
dim_stat4	Computes the first four moments (average, variance, skewness, and kurtosis) of the rightmost dimension for all other dimensions.
dim_stddev	Computes the population standard deviation of a variable's rightmost dimension at all other dimensions.
dim_stddev_Wrap	Computes the population 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_wgt	Computes the weighted sum of a variable's rightmost dimension at all other dimensions.
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 population variance of a variable's rightmost dimension at all other dimensions.
dim_variance_Wrap	Computes the population variance of a variable's rightmost dimension at all other dimensions and retains metadata.
dimsizes	Returns the dimension sizes of the input variable.
doubletobyte	Coerces values of type double to values of type byte.
doubletochar	Coerces values of type double to values of type character.
doubletocharacter	Coerces values of type double to values of type character.
doubletofloat	Coerces values of type double to values of type float.
doubletoint	Coerces values of type double to values of type integer.
doubletointeger	Coerces values of type double to values of type integer.
doubletolong	Coerces values of type double to values of type long.
doubletoshort	Coerces values of type double to values of type short.
dpres_hybrid_ccm	Calculates the pressure differences of a hybrid coordinate system.
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.
draw	Draws the given graphical objects.
drawNDCGrid	Draws NDC grid lines at 0.1 NDC coordinate intervals and labels them.
dsgetp	Gets parameters for Dsgrid routines.
dsgrid2	Interpolates gridded 2-D data.
dsgrid2d	Interpolates gridded 2-D data.
dsgrid2s	Interpolates gridded 2-D data.
dsgrid3	Interpolates gridded 3-D data.
dsgrid3d	Interpolates gridded 3-D data.
dsgrid3s	Interpolates gridded 3-D data.
dspnt2	Interpolates 2-D data at specified points.
dspnt2d	Interpolates 2-D data at specified points.
dspnt2s	Interpolates 2-D data at specified points.
dspnt3	Interpolates 3-D data at specified points.
dspnt3d	Interpolates 3-D data at specified points.
dspnt3s	Interpolates 3-D data at specified points.
dssetp	Sets parameters for Dsgrid routines.
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_quadratic	Estimates and removes the least squares quadratic trend of the rightmost dimension from all grid points.
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.
echo_off	Disables echoing of NCL statements as they are encountered.
echo_on	Enables echoing of NCL statements as they are encountered.
eof2data	Reconstructs a data set from EOFs and EOF time series.
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 meta data. (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 meta data. (NCL's original EOF function).
eofunc	Compute empirical orthogonal functions (EOFs, aka: Principal Component Analysis).
eofunc_ts	Calculates the time series of the amplitudes associated with each eigenvalue in an EOF.
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.
epsZero	Sets all values in input array to zero that are +/- a user supplied epsilon about zero.
equiv_sample_size	Estimates the number of independent values of a series of correlated observations.
erf	Evaluates the real error function.
erfc	Evaluates the real complementary error function.
esacr	Computes sample auto-correlations
esacv	Computes sample auto-covariances
esccr	Computes sample cross-correlations.
esccv	Computes sample cross-covariances.
escorc	Computes sample cross-correlations at lag 0 only.
escovc	Computes sample cross-covariances at lag 0 only.
exit	Forces an NCL script to exit immediately.
exp	Computes the value of e (the base of natural logarithms) raised to the power of the input.
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.
ezfftb	Perform a Fourier synthesis from real and imaginary coefficients.
ezfftf	Perform a Fourier analysis on a periodic sequence.
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).
fabs	Computes the absolute value of numeric types.
fbindirread	Reads records written by a Fortran direct access write.
fbindirSwap	Reads byte-reversed data and writes output file that can be read by fbindirread or cbinread.
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.
fbinseqSwap2	Byte swaps Fortran sequential files (more memory friendly).
fbinwrite	Writes a single binary record to a file in manner analogous to fortran's "form=unformatted, access=sequential".
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.
fileattdef	Defines global (file) attributes associated with a supported file.
filedimdef	Defines dimension names, dimension sizes, unlimited dimensions on a supported file.
filevarattdef	Copies attributes from an input variable to one or more variables on a supported file.
filevardef	Defines a list of variable names, variable var_types, and variable dimension names for a supported file.
filevardimsizes	Returns the dimension sizes of variable on a supported file.
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.
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.
floor	Computes the largest integer value smaller than the input.
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.
fluxEddy	Calculates time averaged eddy flux quantities.
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).
fourier_info	Performs fourier analysis on one or more periodic series.
frame	Updates and clears the given workstation objects.
fspan	Creates an array of evenly-spaced floating point numbers.
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.
ftest	Applies F-test for variances and returns an estimate of the statistical significance.
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.
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 to another (optional truncation).
g2gshv_Wrap	Interpolates a vector quantity from one Gaussian to another (optional truncation) (retains metadata).
gammainc	Evaluates the incomplete gamma function.
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 specified point is inside or outside of a spherical polygon.
gc_latlon	Interpolates points along a great circle on the surface of the globe.
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.
generate_2d_array	Generates a "nice" 2D array of pseudo random data, especially for use in 2D graphics.
generate_unique_indices	Generate unique random indices (subscripts).
get1Dindex	Finds the indices of a one-dimensional array which exactly match a user specified list of values.
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 suppliedlist.
get_file_suffix	Extract the suffix associated with a file name.
get_ncl_version	Returns the current NCL version.
get_sphere_radius	Retrieves the radius of a sphere used in spherical harmonic routines.
getbitsone	Unpacks one-bit chunks from the input array.
getenv	Returns the string value of a shell environment variable.
getfiledimsizes	Returns a list of dimension sizes of the given file variable.
getfilevaratts	Returns all attribute names associated with a variable on a supported file.
getfilevardims	Returns all dimension names associated with a variable on a supported file.
getfilevardimsizes	Returns the dimension sizes of variable on a supported file.
getfilevarnames	Returns an array of file variable names in the specified supported file.
getfilevartypes	Returns the types of the named variables stored in the given supported file.
GetFillColor	Chooses a color from a group of RGB triplets based upon a secondary scalar field.
GetFillColorIndex	Chooses from a list of color table indices based upon a secondary scalar field.
getFillValue	Retrieves the _FillValue of a variable, if present.
getind_latlon2d	Finds the indices (subscripts) of two-dimensional latitude/longitude arrays closest to a user specified latitude/longitude coordinate pair.
getvaratts	Returns a list of attribute names for the given variable.
getVarDimNames	Retrieves dimension names for a variable in memory (deprecated version).
getvardims	Returns a list of dimension names for the given variable.
getVarFillValue	Retrieves the missing value of a variable, otherwise, it returns the default _FillValue.
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.
greg2jul	Converts a Gregorian date to a Julian day.
grib_stime2itime	Converts grib initial_time (string) to time (integer).
grid2triple	Converts a two-dimensional grid with one-dimensional coordinate variables to an array where each grid value is associated with its coordinates.
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_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.
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_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_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 plot 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 v.s. 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_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 X and Y axes
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_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_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_merge_colormaps	Merges two color maps and sets this as the color map for the given workstation.
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_retrieve_colormap	Retrieves a color map for the given workstation.
gsn_reverse_colormap	Reverses the color map for the given workstation.
gsn_streamline	Creates and draws a streamline plot.
gsn_streamline_map	Creates and draws a streamline plot over a map.
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, and colors the vectors given a scalar field.
gsn_vector_scalar_map	Creates and draws a vector plot over a map, and colors the vectors given a 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.
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.
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.
idsfft	Interpolates 2D random data.
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.
ind	Returns the indices where the input is True.
ind_nearest_coord	Determine indices of locations closest to a coordinate array.
ind_resolve	Resolves a single list of indices to their multi-dimensional representation.
indStrSubset	Returns the indices corresponding to the location of the substring, if it is a subset of the other given string.
infoTimeStamp	Draws two text strings at the bottom of the workstation to indicate the time the plot was created and other information.
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.
int2p	Interpolates pressure levels to a different set of pressure levels.
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.
inverse_matrix	Computes the inverse of a general matrix using LU factorization.
isatt	Returns logical values indicating whether the given attributes are attached to the given variable.
isbigendian	Returns True if you are running NCL on a big endian machine.
isbyte	Returns True if input is of type byte.
ischar	Returns True if input is of type char.
iscoord	Returns True for every input string that is a coordinate variables of the given variable.
isdefined	Returns True for every element of the input that is a defined keyword, variable, or function/procedure name.
isdim	Returns True if variable dimensions are defined in the given variable.
isdimnamed	Returns True if variable dimensions have names in given variable.
isdouble	Returns True if input is of type double.
isfile	Returns True if input is of type file.
isfilepresent	Checks if a 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.
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.
isinteger	Returns True if input is of type integer.
isleapyear	Determines if a given year is a leap year (Gregorian calendar).
islogical	Returns True if input is of type logical.
islong	Returns True if input is of type long.
ismissing	Returns True for every element of the input that contains a missing value.
isMonotonic	Check a one dimensional array to see if it is monotonic.
isnan_ieee	Returns a logical array indicating which input values contain an IEEE NaN.
isnumeric	Returns True if input is of type numeric.
ispan	Creates an array of equally-spaced integer values.
isproc	Returns True for every element of the input that is a defined procedure.
isshort	Returns True if input is of type short.
isstring	Returns True if input is of type string.
isStrSubset	Return True or False if one string is a subset of another string.
isunlimited	Returns True if the given dimension name is defined as unlimited on the given file.
isvar	Returns True for every element of the input that is a defined variable.
jul2greg	Converts a Julian day to a Gregorian date.
landsea_mask	Returns a grid that contains a land sea mask given any latitude and longitude array.
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.
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.
lclvl	Calculates the pressure of the lifting condensation level.
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.
linint1	Interpolates from one series to another using piecewise linear interpolation.
linint1_Wrap	Interpolates from one series to another using piecewise linear interpolation, and retains metadata.
linint2	Interpolates from one grid to another grid using bilinear interpolation.
linint2_points	Interpolates from a grid to arbitrarily specified coordinate pairs using bilinear interpolation.
linint2_points_Wrap	Interpolates from a grid to arbitrarily specified coordinate pairs using bilinear interpolation, and retains metadata.
linint2_Wrap	Interpolates from one grid to another grid using bilinear interpolation (retains metadata).
linmsg	Linearly interpolates to fill in missing values.
linrood_latwgt	Computes the latitudes and weights used by the Lin-Rood Model.
linrood_wgt	Computes the weights used by the Lin-Rood Model.
list_files	Lists all of the variables that reference files.
list_filevars	Lists all of the variables associated with a specific file.
list_hlus	Lists all of the HLU objects currently referenced by NCL variables.
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.
ListGetType	Queries the manner in which a variable of type list was created.
ListSetType	Specifies the manner in which a variable of type list is to be implemented.
loadscript	Loads the given NCL script.
local_max	Determines the relative maxima for a 2-dimensional array.
local_max_1d	Determines the relative maxima for a 1-dimensional array.
local_min	Determines the relative minima for a 2-dimensional array.
local_min_1d	Determines the relative minima for a 1-dimensional array.
log	Computes the natural log of a numeric type.
log10	Computes the log base 10 of a numeric type.
lonFlip	Reorders the 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.
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.
lonPivot	Pivots about a user specified longitude.
lspoly	Calculates a set of coefficients for a weighted least squares polynomial fit to the given data.
mask	Masks a multi-dimensional array against another given a single mask value.
max	Computes the maximum value of a multi-dimensional array.
maximize_output	Maximizes the sizes of a series of plots drawn in a single frame.
maxind	Returns the index of the first occurrence of a maximum value.
min	Computes the minimum value of a multi-dimensional array.
minind	Returns the index of the first occurrence of a minimum value.
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.
mod	Remainder function which emulates the fortran "mod" intrinsic function.
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.
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).
monthday	Calculates a concatenated month_day given a day and year.
monthly_total_to_daily_mean	Convert monthly total values [eg, precipitation] to "per d