[ncl-talk] creating daily files from hourly outputs

[Karin Meier-Fleischer]

Sorry, there is a typo

filelist = systemfunc("ls infile*.nc")

wrfin= addfiles(filelist,"r")

pres_pa = wrf_user_getvar(wrfin,"pres",-1)
t_k     = wrf_user_getvar(wrfin,"tk",-1)

system("rm -rf "+file_out)
wrfpost = addfile(file_out,"c")
...


Am 19.01.18 um 13:49 schrieb Karin Meier-Fleischer via ncl-talk:
> Use addfiles to read all 24 files and select the variable which you 
> want to write to the new file.
>
> Assume your 24 files are netCDF  and their names start with 'infile':
>
> ...
> filelist = systemfunc("ls infile*.nc")
>
> f = addfiles(filelist,"r")
>
> pres_pa = wrf_user_getvar(wrfin,"pres",-1)
> t_k     = wrf_user_getvar(wrfin,"tk",-1)
>
> system("rm -rf "+file_out)
> wrfpost = addfile(file_out,"c")
> ...
>
> -Karin
>
> Am 19.01.18 um 13:33 schrieb Noelia otero:
>> Hi Karin,
>>
>> Yes, I know..that's why I am not sure how I can do it. If I have 24 
>> files for one day, I just wanted to extract some variables and 
>> storage the daily values in one single file.
>> Is there any way? If I use system("rm -rf" +file_out) my file with 
>> previous value is removed...so I would have a new file with the 
>> current time, which I don't want.. any suggestion?
>>
>> Thanks!
>> Noelia
>>
>> 2018-01-19 13:30 GMT+01:00 Karin Meier-Fleischer via ncl-talk 
>> <ncl-talk at ucar.edu <mailto:ncl-talk at ucar.edu>>:
>>
>>     Hi Noelia,
>>
>>     NCL can't create a new file when it already exits. You have to
>>     make sure that the file doesn't exist or delete it before using
>>     addfile.
>>
>>     system("rm -rf "+file_out)
>>     wrfpost = addfile(file_out,"c")
>>
>>     -Karin
>>
>>     Am 19.01.18 um 13:15 schrieb Noelia otero via ncl-talk:
>>>     Hi all,
>>>
>>>     I have hourly files from WRF and I wanted to create daily files
>>>     (with the hourly outputs, Time=24). I was using addfile(,
>>>     "c")....I know the error I got it is caused by "c", once the
>>>     first file is created I can´t opened again..(If I am not wrong,
>>>     right?) Is there any way to do it?
>>>
>>>     print(file_in)
>>>     ; wrfout_d01_2010-01-01_00:00:00.nc <http://00.nc>
>>>     wrfin = addfile(file_in,"r")
>>>
>>>     ; I want the output: file_out=met_wrfout_d01_2010-01-01.nc
>>>     <http://met_wrfout_d01_2010-01-01.nc>
>>>     wrfpost = addfile(file_out,"c") ;create new netCDF file
>>>
>>>     pres_pa = wrf_user_getvar(wrfin,"pres",-1)
>>>     t_k = wrf_user_getvar(wrfin,"tk",-1)
>>>
>>>     wrfpost->t_k= t_k
>>>     wrfpost->pres_pa= pres_pa
>>>
>>>     Time = wrf_user_getvar(wrfin,"Times",-1)
>>>     lat = wrf_user_getvar(wrfin,"lat",-1)
>>>     lon = wrf_user_getvar(wrfin,"lon",-1)
>>>
>>>     wrfpost->time    = Time
>>>     wrfpost->lat= lat
>>>     wrfpost->lon= lon
>>>
>>>
>>>     Thanks in advance,
>>>     Best
>>>     Noelia
>>>
>>>
>>>
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>>
>>     -- 
>>     Dipl. Geophys. Karin Meier-Fleischer
>>     Visualization, NCL, CDO
>>     Application Support
>>
>>     Deutsches Klimarechenzentrum GmbH (DKRZ)
>>     Bundesstrasse 45a - D20146 Hamburg - Germany
>>
>>     Phone:+49 (0)40 460094 126 <tel:+49%2040%20460094126>
>>     Fax:+49 (0)40 460094 270 <tel:+49%2040%20460094270>
>>     E-Mail:meier-fleischer at dkrz.de <mailto:meier-fleischer at dkrz.de>
>>     URL:www.dkrz.de <http://www.dkrz.de>
>>
>>     Geschäftsführer: Prof. Dr. Thomas Ludwig
>>     Sitz der Gesellschaft: Hamburg
>>     Amtsgericht Hamburg HRB 39784
>>
>>
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>
>
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-- 
Dipl. Geophys. Karin Meier-Fleischer
Visualization, NCL, CDO
Application Support

Deutsches Klimarechenzentrum GmbH (DKRZ)
Bundesstrasse 45a - D20146 Hamburg - Germany

Phone:    +49 (0)40 460094 126
Fax:      +49 (0)40 460094 270
E-Mail:   meier-fleischer at dkrz.de
URL:      www.dkrz.de

Geschäftsführer: Prof. Dr. Thomas Ludwig
Sitz der Gesellschaft: Hamburg
Amtsgericht Hamburg HRB 39784

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