[ncl-talk] How to convert the value of a NetCDF file to zero

[Setareh Rahimi]

Dear Dave,

So many thanks for your help. I just checked it and it worked.

May I ask you please to advise me on how to only convert the values of all
variables to zero for a specific region and not whole the domain? (for
example lat[0,10], and lon[10,30])?

Thanks in advance.
Kind regards,

On Thu, Jan 25, 2024 at 11:18 PM Dave Allured - NOAA Affiliate <
dave.allured at noaa.gov> wrote:

> The problem is that Dennis's program did not copy the file global
> attributes, which contain part of the georeferencing.  Just add this line
> near the top of the program, after the line "print (vNames)":
>
>       copy_VarAtts (f, fout)
>
>
> On Thu, Jan 25, 2024 at 11:07 AM Ehsan Taghizadeh via ncl-talk <
> ncl-talk at mailman.ucar.edu> wrote:
>
>> Dear Setareh,
>> I suggest you read the variables from the fout file again. For example,
>> if there is a variable named "V10" in fout, you just need to read that
>> variable from fout, as follows:
>> V10_zero=fout->V10
>>
>> This V10_zero has the same coordinates as V10 in the original file, but
>> its values are zero.
>> I hope this is correct.
>>
>>
>> On Thursday, January 25, 2024 at 06:17:12 PM GMT+3:30, Setareh Rahimi via
>> ncl-talk <ncl-talk at mailman.ucar.edu> wrote:
>>
>> Dear Dennis,
>> I noticed an issue. When I use the attached script it converts all values
>> to zero, but the data is no georefrenced any more. So how can I fix this
>> please?
>> Thanks in advance.
>> Best regards,
>>
>> S.Rahimi
>>
>>
>> On Sun, Jan 21, 2024 at 18:44 Dennis Shea <shea at ucar.edu> wrote:
>>
>> Attached is a script that does what you requested.
>>
>>
>> On Sat, Jan 20, 2024 at 6:40 AM Setareh Rahimi via ncl-talk <
>> ncl-talk at mailman.ucar.edu> wrote:
>>
>>
>> Dear NCL users,
>>
>> I have a NetCDF file (attached) that contains some variables. I
>> would like to change the values of all variables to zero for all grid
>> points. So how can I do this using NCL, please?
>>
>> This file is an input file for the WRF-Chem model, and I do not want to
>> change the format of the file, only want to change the values to zero.
>>
>> Please kindly advise me in this regard.
>>
>> Thanks in advance.
>> Kind regards,
>> --
>> S.Rahimi
>>
>>

-- 
S.Rahimi
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