open different files without merge

Hi Community,

I was trying to compute the wind, but the u and v component are in different files. I tried this, but it fails.

cdo -z zip_6 -expr,wind="sqrt(u10m*u10m+v10m*v10m)" -selname,v10m v_input.nc -selname,u10m u_input.nc output.nc

cdo expr (Abort): Too many streams! Operator needs 1 input and 1 output streams.

I know I can use merge, but it takes a long time

Kind regards,

Estanislao

Hi Estanislao,

the expression operator takes only one input stream (file), that's why you have to merge it on the fly:

cdo -z zip_6 -expr,wind="sqrt(u10m*u10m+v10m*v10m)" -merge -selname,v10m v_input.nc -selname,u10m u_input.nc output.nc

Thanks so much Karin

(1-2/2)

CDO