Create Xtime variable?
Added by Gabe Bromley over 3 years ago
I have some WRF auxiliary files that are missing the XTIME variable, so CDO time based operations aren't working. I tried:
cdo settaxis,2011-04-01,00:01:00,1hour sfc_vars_d01_2011-04-01_01\:00\:00.nc test.nc
But this took eons(over 30 minutes for 1 file) and I have several thousand files. The "TIMES" variable has the correct date and time for each time step, is there a way to just create XTIME for CDO to use from this "TIMES" variable? I have attached the ncdump output that shows the Times string.
Thanks,
Gabe
| netcdf_info.txt (10.9 KB) netcdf_info.txt |
Replies (2)
RE: Create Xtime variable? - Added by Ralf Mueller over 3 years ago
hi Gabe!
First the XTIMES variable is clearly missing (it is used in the coordinates attribute but not present in the file), so I would go back to the source of the data and try to get.
If you really have to create it yourself, you can create it in a separate file and attach the variable later with some NCO command.
to create a time-axis variable, you can use the seq operator (called for in releases prios to 1.9.7:
cdo -f nc -chname,seq,XTIMES -settaxis,2011-04-01,00:01:00,1hour -seq,1,34 xtimes.nc ncrename -v time,XTIME xtimes.nc # rename the coordinate variable ncks -C -x -v XTIMES xtimes.nc xtime.nc # remove the data variable
The you combine
xtime.nc with your original file use NCO's ncecat I think.