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apply cdo operator without copy of input file

Added by Christopher Danek about 4 years ago

Hi

I have a general question: are there possibilities to operate cdo commands directly on a file, without making a copy of the input file? For instance, is it possible to delete specific timesteps directly in a file without the workaround `cdo -delete,timestep=1,3 fin fout && mv fout fin`?

Thanks and kind regards,
Chris


Replies (5)

RE: apply cdo operator without copy of input file - Added by Karin Meier-Fleischer about 4 years ago

Hi Christopher,

the answer is no. Sorry.

-Karin

RE: apply cdo operator without copy of input file - Added by Ralf Mueller about 4 years ago

Well, actually there is an undocumented operator currently in a testing phase and it's called apply

with a list of files

ls [0-9][0-9].nc                                    
01.nc  02.nc  03.nc  04.nc  05.nc  06.nc  07.nc  08.nc  09.nc  10.nc  11.nc  12.nc  13.nc  14.nc  15.nc  16.nc  17.nc  18.nc  19.nc  20.nc  21.nc  22.nc

you can for example select a certain region before merging with
cdo -mergetime -apply,selindexbox,1,2,1,2 [ [0-9][0-9].nc ] out.nc
With the latest release you can check it yourself.

Another option is to create a proper command line, but this might be easier with python than with bash. Inserting a CDO operators in front of each filename in a python list is a one-liner...

hth
ralf

RE: apply cdo operator without copy of input file - Added by Ralf Mueller about 4 years ago

sorry Christopher, my answer has nothing to do with your question. I got that completely wrong - should take more time for reading before writing I guess

cheers
ralf

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