| Re: NetCDF Attribute Inquiry [message #24320 is a reply to message #24242] |
Thu, 22 March 2001 04:50  |
Alex Schuster
Messages: 124
Registered: February 1997
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Senior Member |
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"Liam E. Gumley" wrote:
> Alex Schuster wrote:
[How to check for available attributes without using NCDF_ATTINQ(),
which sometimes gives bad results]
> Here is a function which returns a list of attribute names for a given
> variable name. If the variable name is set to the null string '', a list
> of global attribute names is returned.
>
> FUNCTION NCDF_ATTDIR, CDFID, VARNAME
[...]
Thanks! That's what I needed.
As I also don't know for sure beforehand which variables are in the
file, I modified your routine so it returns this info. I guess you also
already have a NCDF_VARDIR() function, but here it is anyway:
FUNCTION NCDF_VARDIR, CDFID
;- Check arguments
if n_params() ne 1 then message, 'Usage: RESULT = NCDF_VARDIR(CDFID)'
if n_elements(cdfid) eq 0 then message, 'CDFID is undefined'
;- Set default return value
varnames = ''
fileinfo = ncdf_inquire(cdfid)
nvars = fileinfo.nvars
;- If variables were found, get attribute names
if nvars gt 0 then begin
varnames = strarr(nvars)
for index = 0, nvars - 1 do $
varnames[index] = (ncdf_varinq(cdfid,index)).name
endif
;- Return the result
return, varnames
END
Alex
--
Alex Schuster Wonko@weird.cologne.de PGP Key available
alex@pet.mpin-koeln.mpg.de
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