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scatter/gather - split and join regular gridded data

Added by Ralf Mueller about 11 years ago

See this thread

Finally I wrote something about these two gems ... let'em shine


Replies (1)

RE: scatter/gather - split and join regular gridded data - Added by Karin Meier-Fleischer over 4 years ago

Update:

the operators scatter and gather have been replaced by distgrid and collgrid.

The operator distgrid distributes a dataset into smaller pieces.
The operator collgrid collects the data of the input files to one output file.

See and ff. https://code.mpimet.mpg.de/projects/cdo/embedded/index.html#x1-1280002.2.11

Example:

Split data file into regions (-distgrid,nx,ny)

cdo -distgrid,3,2 infile.nc infile_parts

Loop: compute the timmean of each file

for f in $(ls infile_parts*.nc); do; cdo -timmean ${f} avg_${f}; done

Collect the regions (-collgrid,nx)

cdo -O -collgrid,3 avg_*.nc outfile.nc
    (1-1/1)