Re: [netcdfgroup] Renaming dimensions and retaining their values

• To: "Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <matthew.thompson@xxxxxxxx>
• Subject: Re: [netcdfgroup] Renaming dimensions and retaining their values
• From: "ashwinD12 ." <winash12@xxxxxxxxx>
• Date: Wed, 6 Jul 2016 21:11:41 +0530

Matt,
          That is very likely the problem ! I have netCDF 4.3.2 and I have
downloaded 4.4.0 and I can go ahead and install it. But what happens to the
rest of the software that I have such as WRF etc ? Will everything be
needed to be recompiled once I put in a new version of netCDF ?
Thanks,
Ashwin.

On Wed, Jul 6, 2016 at 8:50 PM, Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS
AND APPLICATIONS INC] <matthew.thompson@xxxxxxxx> wrote:

> On 07/06/2016 07:01 AM, ashwinD12 . wrote:
>
>> Hello,
>>             I have a netCDF4 file that I downloaded using nccopy and
>> OPenDAP. I want to be able to rename few of the dimensions in that
>> file(read that as coordinate) while retaining the values of the same.
>>
>> I tried using the nco operator(nco version 4.6) specifically the
>> ncrename operator.
>>
>> This is the command that I issued - ncrename -d lat,dimy_D hgt_925.nc
>> <http://hgt_925.nc> and it does rename the dimension.
>>
>> However it removes the values that are associated with lat.
>>
>> I modified the input to ncrename and I tried this -
>>
>> ncrename -d lat,dimy_D -v lat,dimy_D hgt_925.nc <http://hgt_925.nc>.
>> This does give values for dimy_D but it gives  them the value as
>> 9.9.2510E36. Short of writing my own program to rename my coordinate
>> variables is there any other utility out there that will help me do the
>> same ?
>>
>
> Ashwin,
>
> I want to say this might be a bug in netCDF4. What version are you running?
>
> I ask because NCO has always had "fun" with this procedure:
>
> http://nco.sourceforge.net/nco.html#ncrename_crd
>
> If I try (on a file here):
>
>   $ ncrename -d lon,newlon -v lon,newlon input.nc4 output.nc4
>
> with netCDF4 4.3.2 and NCO 4.4.4, I see your issue (newlon set to
> _FillValue or the like). But, using netCDF4 4.4.0 and NCO 4.5.5 that
> command works just fine.
>
> So, you can try a newer netCDF4 library or go through netCDF3 (according
> to that page).
>
> Matt
>
> --
> Matt Thompson, SSAI, Sr Scientific Programmer/Analyst
> NASA GSFC,    Global Modeling and Assimilation Office
> Code 610.1,  8800 Greenbelt Rd,  Greenbelt,  MD 20771
> Phone: 301-614-6712                 Fax: 301-614-6246
> http://science.gsfc.nasa.gov/sed/bio/matthew.thompson
>

• Follow-Ups:
  • Re: [netcdfgroup] Renaming dimensions and retaining their values
    • From: Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC]

• References:
  • [netcdfgroup] Renaming dimensions and retaining their values
    • From: ashwinD12 .
  • Re: [netcdfgroup] Renaming dimensions and retaining their values
    • From: Thompson, Matt (GSFC-610.1)[SCIENCE SYSTEMS AND APPLICATIONS INC]