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Re: netCDF variable name problem
Hi Dave,
In the Users Guide (Ch3 Sec1.2. File variables -- or in the index "Variable /
names, invalid in NetCDF files") you'll find
In some netCDF files the variable names are not consistent with
Ferret's rules for variable
naming. They may be case-sensitive (for example, variables "v" and "V"
defined in the same file),
may be restricted names such as the Ferret pseudo-variable names I, J,
K, L, X, Y, Z, T,
XBOX, YBOX, ZBOX, or TBOX, or them may include "illegal" characters
such as "+", "-",
"%", blanks, etc. To access such variable names in Ferret file simply
enclose the name in single
quotes. For example,
yes? PLOT 'x'
I suggest that you handle this in LAS by creating an initialization script for
this data set which contains the single line
LET valid_name = 'invalid_name'
and then configure LAS to use "valid_name". That way no further modifications to
scripts would be required.
- steve
P.S. The procedures for creating initialization scripts have varied a bit between
LAS versions. Check back with las@pmel.noaa.gov if it is unclear how to create
'em in your version.
==========================
Dave Brown wrote:
> Hi,
>
> I have encountered a problem using LAS/Ferret to plot a particular
> variable from a group of netCDF file I have set up under LAS. The variable in
> question is named 'NE' in the netCDF file. The GenericLAS_debug.txt file
> reports the following:
>
> yes? GO "/tmp/lasgo167401535644.jnl"
> **ERROR: command syntax: ne
> ne may not start an expression
> CONTOUR/FILL/levels=30/set ne
> Command file, command group, or REPEAT execution aborted
>
> killing...Waiting for Ferret to exit...
> Ferret exited...
>
> So it appears that because 'ne' is a Ferret operator, it is not
> recognized as a variable name in this context. Is there a workaround for
> this problem short of rewriting all the netCDF files and giving the
> variable another name?
> -Dave Brown
> dbrown@ucar.edu
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