| IDL problem with ncdf_vardef: can' exit definition mode [message #84360] |
Thu, 30 May 2013 08:00 |
Therese
Messages: 5
Registered: May 2013
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Junior Member |
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Hello,
I have problems with creating a ncdf-file: I can't define all of my variables with ncdf_vardef().
Two of my variables (longitude, latitude) have the dimensions x*y=6000*4800 and the whole data-field has x*y*k=6000*4800*10. I want to save the data-field in k=10 variables with dimensions x*y in the ncdf-file.
The definition of longitude and latitude works but if I want to define the ten data-fields I get the following error message:
"NCDF_CONTROL: Attempt to take the file out of define mode (ENDEF) failed. (NC_ERROR=-31)"
I first tried to define them in a for-loop and I also tried to do it "by hand" one for one but it didn't help. If I remove the definitions for the data-fields the program works.
I do not understand why there is a difference between "latid", "lonid" and the "datid"-vector. Is there a maximum number of definitions which can be defined?
I'm using idl 6.4.
Please help! Thank you!
Therese Keck
=============
My example-code:
id = NCDF_CREATE(file,/CLOBBER)
NCDF_CONTROL,id,/FILL
xid = NCDF_DIMDEF(id,"xid",x)
yid = NCDF_DIMDEF(id,"yid",y)
latid = NCDF_VARDEF(id,"latitude",[xid,yid],/FLOAT)
lonid = NCDF_VARDEF(id,"longitude",[xid,yid],/FLOAT)
datid = lonarr(size(label,/n_elements))
for d=0,1 do $
datid[d] = NCDF_VARDEF(id,label[d],[xid,yid],/SHORT)
NCDF_CONTROL,id,/ENDEF ; the program stops here
NCDF_VARPUT,id,lonid,lon
NCDF_VARPUT,id,latid,lat
for d=0,size(label,/n_elements)-1 do $
NCDF_VARPUT,id,dat[d],data[*,*,d]
NCDF_CLOSE,id
===========
note:
label is a string-array for the names of the variables of the data-field: Albedo_WSA_Band1 Albedo_WSA_Band2 Albedo_WSA_Band3 Albedo_WSA_Band4 Albedo_WSA_Band5 Albedo_WSA_Band6 Albedo_WSA_Band7 Albedo_WSA_vis Albedo_WSA_nir Albedo_WSA_shortwave
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