Re: Coordinate scripting for

Thank you Dr. Shea,
M variable has 109 rows and 139 columns.
Does that change things?

i tried the suggestions from the two pages you gave below by adding

                v_plane = wrf_user_intrp3d( v,p,"h",pressure,0.,False)
                printVarSummary(v_plane)
                v_plane!0 = "lat"
                v_plane!1 = "lon"
                v_plane&lat = lat
                v_plane&lon = lon
                V = v_plane({5:15},{-30:10})
                printVarSummary(V)

I am now getting a different error:

Variable: v_plane
Type: float
Total Size: 60604 bytes
            15151 values
Number of Dimensions: 2
Dimensions and sizes: [109] x [139]
Coordinates:
Number Of Attributes: 4
  description : v Velocity
  units : m/s
  _FillValue : -999999
  PlotLevelID : 850 hPa
fatal:Variable (lat) is undefined
fatal:Execute: Error occurred at or near line 39 in file NCL_ascii_V700.ncl

On Dec 11, 2007 1:13 PM, Dennis Shea <shea_at_ucar.edu> wrote:
> [1] To use "coordinate subscripting" two conditions must be present:
> [a] the dimensions must be named. The arrays below do not have
> named dimensions.
> [b] The named dimensions must have 1D [not 2D] monotonically
> {in/de}creasing coordinates associated with each named
> dimension.
>
> Note: These are netCDF rules and NCL adheres to the netCDF
> variable model.
> [2] If you have variables that have 2d variable arrays that contain
> coordinates (like WRF XLAT and XLONG variables] you
> can not use coordinate subscripting [See 1b above ]
>
> [3] Pls read
> http://www.ncl.ucar.edu/Document/Language/cv.shtml
> http://www.ncl.ucar.edu/Document/Manuals/Ref_Manual/NclVariables.shtml
>
> Erik Noble wrote:
> > Hi.
> > I added a printVarSummary(v_plane) to the code to see the error more clearly.
> > The error still remains (below).
> >
> > any suggestions?
> > -erik
> >
> >
> > Variable: v_plane
> > Type: float
> > Total Size: 60604 bytes
> > 15151 values
> > Number of Dimensions: 2
> > Dimensions and sizes: [109] x [139]
> > Coordinates:
> > Number Of Attributes: 4
> > description : v Velocity
> > units : m/s
> > _FillValue : -999999
> > PlotLevelID : 850 hPa
> > fatal:Dimension (1) of (v_plane) is not named and therefore doesn't
> > have an associated coordinate variable
> > fatal:Execute: Error occurred at or near line 37 in file NCL_ascii_V700.ncl
> >
> >
> > On Dec 11, 2007 12:31 PM, Erik Noble <enoble_at_giss.nasa.gov> wrote:
> >
> >> Dear NCL,
> >> I am trying to use coordinate subscripting to pull data from an array:
> >> V = v_plane({5:15},{-30:10})
> >> I am getting the error below.
> >> My code is attached.
> >> My I have some help?
> >> Thank you for your help.
> >> -Erik
> >>
> >>
> >> Erik_at_noble:/Volumes/Data_and_Models/ncl_scripts:ncl NCL_ascii_V700.ncl
> >> Copyright (C) 1995-2007 - All Rights Reserved
> >> University Corporation for Atmospheric Research
> >> NCAR Command Language Version 5.0.0
> >> The use of this software is governed by a License Agreement.
> >> See http://www.ncl.ucar.edu/ for more details.
> >>
> >>
> >> Variable: times
> >> Type: string
> >> Total Size: 1948 bytes
> >> 487 values
> >> Number of Dimensions: 1
> >> Dimensions and sizes: [487]
> >> Coordinates:
> >> Number Of Attributes: 2
> >> description : times in file
> >> _FillValue : missing
> >>
> >> Variable: v
> >> Type: float
> >> Total Size: 1636308 bytes
> >> 409077 values
> >> Number of Dimensions: 3
> >> Dimensions and sizes: [27] x [109] x [139]
> >> Coordinates:
> >> Number Of Attributes: 2
> >> description : v Velocity
> >> units : m/s
> >>
> >>
> >> Variable: u
> >> Type: float
> >> Total Size: 1636308 bytes
> >> 409077 values
> >> Number of Dimensions: 3
> >> Dimensions and sizes: [27] x [109] x [139]
> >> Coordinates:
> >> Number Of Attributes: 2
> >> description : u Velocity
> >> units : m/s
> >>
> >>
> >> Variable: u
> >> Type: float
> >> Total Size: 1636308 bytes
> >> 409077 values
> >> Number of Dimensions: 3
> >> Dimensions and sizes: [27] x [109] x [139]
> >> Coordinates:
> >> Number Of Attributes: 2
> >> description : u Velocity
> >> units : m/s
> >> fatal:Dimension (1) of (v_plane) is not named and therefore doesn't have an
> >> associated coordinate variable
> >> fatal:Execute: Error occurred at or near line 37 in file NCL_ascii_V700.ncl
> >>
> >>
> >>
> >> Erik_at_noble:/Volumes/Data_and_Models/ncl_scripts:
> >>
> >>
> >>
>
>
>
>

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