[ncl-talk] Merge data in ncl

[Kunal Bali]

Soma,

you may try

all_files = systemfunc("ls /Users/kunalbali/*year*.nc")
fall=addfiles(all_files, "r")
ListSetType(fall, "cat")
ozone =fall[:]->AIRS3STM_006_O3_VMR_A
printVarSummary(ozone)
diro = "./"
filo = "merge.nc"
ncdf = addfile(diro+filo ,"c")
filedimdef(ncdf,"time",-1,True)
ncdf->AIRS3STM_006_O3_VMR_A=ozone



---
Kunal Bali





On Wed, Feb 20, 2019 at 8:36 PM Soma Roy <somaroy892 at gmail.com> wrote:

> There is need. I need to merge the netcdf files into single one using ncl
> only.
>
> This file will be utilized in other purpose.
> So processing through ncl is urgent.
>
> Soma
>
> On Wed, Feb 20, 2019, 20:19 Dennis Shea <shea at ucar.edu wrote:
>
>> Both CDO and NCO can easily merge (concatenate) the files. Still neither
>> is NCL as requested by the user.
>>
>> "I want to merge them into a single file *using ncl only*"
>>
>> In my opinion, if you are processing with NCL there is no need to
>> concatenate (merge) the files.
>>
>> fils = *systemfunc* <https://www.ncl.ucar.edu/Document/Functions/Built-in/systemfunc.shtml> ("ls TRMM_3B42_2013*.nc") ; file paths
>> print(fils)
>>
>> f  = *addfiles* <https://www.ncl.ucar.edu/Document/Functions/Built-in/addfiles.shtml> (fils, "r")
>> x = f*[:]*->variable_name
>>
>> *printVarSummary*(x)
>> *printMinMax(*x, 0)
>> ===
>>
>> You could create a netCDF using NCL's  *write_netcdf* <https://www.ncl.ucar.edu/Applications/write_netcdf.shtml> guide:
>>
>>
>> On Wed, Feb 20, 2019 at 4:49 AM Appo derbetini <appopson4 at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> You can proceed with  CDO
>>>
>>> cdo    mergetime  TRMM_3B42_20130611.nc    output.nc
>>>
>>> or  NCO
>>>
>>> ncrcat       TRMM_3B42_20130611.nc     output.nc
>>>
>>>
>>> Le mer. 20 févr. 2019 à 11:15, Soma Roy <somaroy892 at gmail.com> a écrit :
>>>
>>>> Hello,
>>>> I have several netcdf files containing daily data. I want to merge them
>>>> into a single file using ncl only.
>>>> Please kindly inform me about the above.
>>>>
>>>> Files are like;
>>>> TRMM_3B42_20130611.nc
>>>> TRMM_3B42_20130612.nc
>>>> TRMM_3B42_20130613.nc
>>>> and so on..
>>>>
>>>> Thanking you,
>>>> Soma
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