CDO

Hi Kunal,

you can extract the timestep before the missing one and set all values to missing value. Then set the time axis to the missing date and merge it with your data file. Using a value range which doesn't fit your data value range will set all values to missing value.

You have to modify the setvrange values. Here in my test I use data with a value range 240-310 so I set the setvrange outside to -100-0:

cdo -O -settaxis,2004-09-25 -setvrange,-100,0 -selday,24 -selmonth,9 -selyear,2004 infile.nc tmp2.nc

cdo mergetime infile.nc tmp2.nc new_infile.nc

Maybe there is another way but it works.

-Karin

Yeah, that would work. Thanks for this suggestion.

But if we have more than one missing date/timesteps with different time periods (i.e. large datasets with so many missing timesteps)then how can we add those time steps. Suppose file1.nc has 2061 time steps and file2.nc has 2032 time steps then how to make two files with same timesteps. Every time splitting the timesteps would be the time-consuming process.

You should write a shell script to retrieve from your two files the timesteps and see which timesteps are missing in file2.nc.

Assume file1.nc has 2061 time steps and file2.nc has 2032 time steps:

...
cdo -s showyear file1.nc | xargs -n1 > times_file1
cdo -s showyear file2.nc | xargs -n1 > times_file2

comm -23 times_file1 times_file2 > missing_times

...
Loop over the missing time steps.

-Karin

Hi
How can I add multiple dates of different year and month using ksh script. Please share one example for it. Wait for a reply. Thanks

Hi Jyoti,

you can use a loop in your ksh script to insert the wanted days and months. But you have to do this little work by yourself, we don't have enough time to provide everything. Sorry.

-Karin