| how to list variable names from netCDF file? [message #5351] |
Thu, 07 December 1995 00:00 |
f055
Messages: 29
Registered: April 1995
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Junior Member |
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Can anyone help me with the following problem?
I am trying to write some IDL code to read in a number of netCDF files, without
knowing in advance the names of the variables in the file. Is there a routine
which can return the variable name of the Nth variable in the file?
Once open, I can use ncdf_inquire to find the number of variables, but
ncdf_varinq says it can only return the name of a variable if you give it
the variable's id, which can be got from calling ncdf_varid. But ncdf_varid
requires the variables name! What I need is an equivalent of ncdf_attname,
which returns the name of the Nth attribute.
What's the solution?
......................... Dr Tim Osborn . t.osborn@uea.ac.uk
.... ___/.. __ /.. /.. /. Senior Research Associate . phone:01603 592089
... /..... /. /.. /.. /.. Climatic Research Unit . fax: 01603 507784
.. /..... __/.. /.. /... School of Environmental Sciences.
. /..... /\ ... /.. /.... University of East Anglia .
____/.._/..\_..____/..... Norwich NR4 7TJ .
......................... UK .
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| Re: how to list variable names from netCDF file? [message #5498 is a reply to message #5351] |
Thu, 07 December 1995 00:00  |
Andy Loughe
Messages: 174
Registered: November 1995
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Senior Member |
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T.Osborn wrote:
>
> Can anyone help me with the following problem?
>
> I am trying to write some IDL code to read in a number of netCDF files, without
> knowing in advance the names of the variables in the file. Is there a routine
> which can return the variable name of the Nth variable in the file?
>
> Once open, I can use ncdf_inquire to find the number of variables, but
> ncdf_varinq says it can only return the name of a variable if you give it
> the variable's id, which can be got from calling ncdf_varid. But ncdf_varid
> requires the variables name! What I need is an equivalent of ncdf_attname,
> which returns the name of the Nth attribute.
>
Maybe the documentation is causing you trouble (imagine that!).
Here is a small example...
file = '/Datasets/nmc/uwnd.79.nc'
ncid = NCDF_OPEN( file )
result = NCDF_INQUIRE( ncid )
num_vars = result.NVARS
for i = 0, num_vars-1 do print, ncdf_varinq(ncid,i)
--------
Andrew F. Loughe (afl@cdc.noaa.gov)
University of Colorado, CIRES * Campus Box 449 * Boulder, CO 80309
phone: (303) 492-0707 fax: (303) 497-7013
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