How can I merge only specific .nc files to work with cdo?
from a long list of files that look like this:
var_1-2.nc
var_3-4.nc
var_5-6.nc
.
.
var_99-100.nc
I would like to to a cdo mergetime only to the last e.g 10 files Anyone could help me with the syntax here?
CDO can accept wild cards. Based on what you have said the following should work:
cdo mergetime var_99*.nc out.nc
Just to add to Rob's answer, it is perhaps more robust to do
cdo mergetime var_9?-*.nc out.nc
The ? can only be replaced by a single character so this would pick up all the 90s files but ignore var9-10.nc
Of course if you wanted only the last 7 files then this wouldn't work and your tail solution is better.
As Rob mentions in his comments, in general it is a good idea to pad file name indices with zeros when generating them, so that a list command like ls will give them in correct numerical order - you can do this with seq -w i1 i2 for example.