CDO

ncrename -v <oldVarName>,<newVarName> <yourfile>

hth
ralf

oops!, Maybe I didn't explain what I want

the loop is my issue, could you please help to do a loop using cdo?

Regards.

Yousef

Since I don't know the interpreter you are using, you might check this link https://hyperpolyglot.org/unix-shells#execution-control and select the right one on your own.

hth
ralf

I use linux.

if I say that my data files are from 01-01-2015 to 31-12-2015 and file name format is sm_d_01-01-2015.nc for instance, how I can loop through these files?

Thanks in Advance.

Yousef Albuhaisi wrote:

I use linux.

good choice, but it doesn't tell you (and me) which shell you are using. I guess it's bash, but please check the output of

echo $SHELL

if I say that my data files are from 01-01-2015 to 31-12-2015 and file name format is sm_d_01-01-2015.nc for instance, how I can loop through these files?

I think you have to get familiar with wildcards first. wildcards are a syntactic way of your command line interpreter (running in your terminal/konsole/whatever
) to select multiple files. The simplest example might the * symbol:

*.nc

 unix wildcards

hth
ralf

Hi,

When I do echo $SHELL, i got this /bin/bash

now if I do the following:

cdo -chname,SM_D_LPRM,vsm *.nc *.nc

is it going to work?

Regards

Yousef Albuhaisi wrote:

Hi,

When I do echo $SHELL, i got this /bin/bash

your command line interpreter (shell) is bash then

now if I do the following:

cdo -chname,SM_D_LPRM,vsm *.nc *.nc

is it going to work?

nope, inputs and output have to given explicitly - you have to write a loop. Try this for testing what is captured by your wildcard:

 for file in *.nc; do ls $f; done

CDO will always create a new file whereas NCOs (like ncrename) can write to the input directly and do not need to create a new file. So depending on what you want, you have to choose the tools.

then just add your command to the loop with a new output name like this:

 for file in *.nc; do ls $f; cdo -chanem,SM_D_LPRM,vsm $f changedName_$f ; done

 for file in *.nc; do ls $f; ncrename -v SM_D_LPRM,vsm $f ; done

warning: ncrename will change your input - so if you do something wrong your original files might be corrupted afterwards!

I'd recommend CDO because of that. It leaves input untouched and you can rerun stuff for testing as often as you like

Regards

when I do

for file in *.nc; do ls $f; cdo -chanem,SM_D_LPRM,vsm $f new_$f ; done

it says:

cdo chname (Abort): Too few streams specified! Operator needs 1 input and 1 output streams.

as sorry - I messed up the variable name, use this instead

for file in *.nc; do ls $file; cdo -chanem,SM_D_LPRM,vsm $file new_$file ; done

it worked!

Thanks a lot

u r welcome

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