CDO

With 1.5.9 you can use wildcards with the cat operators. So you might try something like this:

cdo yeardaymean -cat "temp2_echam5_amip_vary_ghg_mean_19*.nc" climate.nc

hth
ralf

For this feature the wildcards have to be expanded in CDO and not by the Shell. Therefor single quotes must be used:

cdo yeardaymean -cat 'temp2_echam5_amip_vary_ghg_mean_19*.nc' climate.nc

Ralf and Uwe-

Thanks for the suggestions. Are only simple wildcards allowed, or can I use more complex regular expressions. Since I'll be going over 30 years and want to exclude some of the files, a simple 19* won't work.

Don

Hi Don,

We implemented a simple pattern matching via glob [http://en.wikipedia.org/wiki/Glob_%28programming%29]. Allowed wildcards are `*', `?' or `[ characters ]'.

Uwe

Hi! I'm just starting to use CDO.

In some posts I have seen the answer "As all CDO operators with an unlimited number of input files this operator can't be combined with other operators.", but the first option appears to overcome that limitation. Is there something I am missing?
Thanks!

if you use operators like 'cat' or merge together with a wildcard your can more operators on top of the results of therese operations. But operators output cannot be used for input of 'cat' or 'merge'

hth
ralf

Hello,

I am using this command above and I want to combine files which are 18 Gb each for each year.
The above command with the "cat" operator concatenates the input files into one where the climatology is indeed correct but the dimension is huge/equal to the total of input files.
Is there any way that the output file is actually only one file
with 365 values for all the climatological period and does not include the
input files yearly content that increases its dimensions?

Thank you a lot!

hi!

which command exactly do you use? the yeardaymean will create one output file covering a single year as a climatology. so if your input is daily and is 18GB I expect the output to have the same size.

cheers

Hi Ralf!

I am using exactly the "ydaymean" as follows:

cdo ydaymean -cat "filename1year.nc" "filenameAnotherYear.nc" output.nc

(the yeardaymean was not found in the latest documentation I searched https://code.mpimet.mpg.de/projects/cdo/embedded/index.html#x1-5980002.8.32
so I assumed you changed name of the function to "ydaymean" which has the same description)

can you u make the inputs available for download? for testing a small selection would be fine. cdo -remapnn,global_10 will create a very coarse grid. selecting only a single variable will also be useful to reduce filesize. gzip compression works very good with netcdf