Aquileo | Recent changes to support-requests

Aquileo | #30 ncap2 on shell gives error

Fri, 19 Jul 2024 15:00:09 -0000

Either the dim ens_member is already defined as 0 (UNLIMITED) in the input file or your shell script is setting it to 0.

Aquileo | #30 ncap2 on shell gives error

Fri, 19 Jul 2024 13:47:25 -0000

Thanks Henry,
Now ens_member = UNLIMITED ; // (0 currently))
is there any way to define this dimension as fixes size?

Aquileo | #30 ncap2 on shell gives error

Fri, 19 Jul 2024 13:06:58 -0000

its a bit tricky because you are redefining the variable "pre" that is already in input. try something like.

defdim("ens",40 );
pre_new[$time,$latitude,$longitude,$ens]=pre;

...Henry

Aquileo | #30 ncap2 on shell gives error

Fri, 19 Jul 2024 12:47:37 -0000

Dear Henry,

Thanks for the tip. I used the follwoing script

cat << EOF > test.nco
defdim("ens_member", $ens);
pre[\$time, \$latitude, \$longitude, \$ens_member] = pre;
EOF

($ens is expanded from bash as a variable as it changes from 00 to 20) .

With this, ncap2 passed without any error from the bash script. But then when I look into the output file, no displayable variables found. I also tried defdim("ens",40 ), but it also does did not work out.

Aquileo | #30 ncap2 on shell gives error

Thu, 18 Jul 2024 15:33:31 -0000

I suggest you get the command working in a script first then once its working move it to the command line. eg

test.nco

defdim("ens",40 );
pre[$time,$latitude,$longitude,$ens]=pre

then run the above script with the command

ncap2 -S test.nco in.nc out.nc

...Henry

Aquileo | ncap2 on shell gives error

Thu, 18 Jul 2024 15:24:16 -0000

I want to use ncap 2 on a shell script and followed examples from other tickets. However, I am still getting an error. Could you please correct this script? ncap2 -s "defdim('ens_member',${ensemble});pre[\$time, \$latitude,\$longitude, \$ens_member] = pre;" "$in" "$out" Many thanks,

Aquileo | #28 How to add time variable in the NETCDF file

Fri, 07 Apr 2023 16:10:22 -0000

Please read the manual on ncap2. You can use ncap2 to define a time dimension of the right size (or rename, with ncrename, the existing dimension to time), then create a time variable with that dimension, a units attribute, then populate it with values in the appropriate units, and add a calendar attribute so that the final results looks something like:

    double time(time) ;
      time:units = "days since 1850-01-01 00:00:00" ;
      time:long_name = "time" ;
      time:calendar = "gregorian" ;

It might be easier to just append (with ncks -A -v time in.nc out.nc) time from file that already has one.

Aquileo | How to create correct time dimension in the concatenated netcdf file

Thu, 06 Apr 2023 18:05:11 -0000

Dear NCO Support Team,

I have a netcdf file containing monthly data of several variables from Jan1850 to Dec2020. I want to concatenate this file twice and then want to correct the time dimension of this concatenated file to be continuous (i.e., the total time will be Jan1850 to Dec2191). Please note that the time dimension of this netcdf file is in Julian calendar and I want to keep this same Julian calendar. Please advise how can I get this time record in the new concatenated netcdf file?

Best regards,
Mubashar

Aquileo | How to add time variable in the NETCDF file

Thu, 06 Apr 2023 14:46:12 -0000

Dear NCO support team,

I have a netcdf file containing monthly data for several variables over the period 1850-01-17 till 2051-12-17. The time variable/dimension has been removed somehow and doesn't exist anymore in this netcdf file. I want to add this monthly time dimension starting from 1850-01-17 till 2051-12-17. How can I add this time using NCO? Moreover, can I add this time in Julian calendar format?

Aquileo | #27 how to calculate median

Fri, 17 Jun 2022 20:29:32 -0000

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