# Re: [netcdfgroup] Export netcdf by mathematica(dimensions problems)

• To: =?gb18030?q?=22=BB=C6=BD=A8=C6=BD=22?= <1486268124@xxxxxx>
• Subject: Re: [netcdfgroup] Export netcdf by mathematica(dimensions problems)
• From: Roy Mendelssohn - NOAA Federal <roy.mendelssohn@xxxxxxxx>
• Date: Sat, 2 Nov 2013 22:22:27 -0700
```Sure.  look at the Mathematica help  (there is a less polite internet
abbreviation for this, but I have refrained from using it), such as at:

erence.wolfram.com/mathematica/ref/format/NetCDF.html

or more importantly built into Mathematica.  Notice that the "export" command
can take elements, and among other things the elements can define dimensions.

HTH,

-Roy

On Nov 2, 2013, at 10:14 PM, "»Æ½¨Æ½" <1486268124@xxxxxx> wrote:

>     I'm trying to create .nc files by Mathematica and meet problems.
> Mathematica will automatically set the "dimensions" term in the netcdf
> exported. It looks like(by ncdump):
>
> netcdf E:\netcdf\ncdump\my3gpi20090101-20130531 {
> dimensions:
>  year_dayDim1 = 1581 ;
>  f107dDim1 = 1581 ;
>  kpDim1 = 1581 ;
>  kpDim2 = 8 ;
> variables:
>  int year_day(year_dayDim1) ;
>   year_day:long_name = "4-digit year followed by 3-digit day" ;
>  double f107d(f107dDim1) ;
>   f107d:long_name = "daily 10.7 cm solar flux" ;
>   f107a:long_name = "81-day average 10.7 cm solar flux" ;
>  double kp(kpDim1, kpDim2) ;
>   kp:long_name = "3-hourly kp index" ;
> where year_dayDim1,f107dDim1,f107aDim1,kpDim1,kpDim2 are created by
> Mathematica automatically. However, the "right" form  excepted should be:
>
> netcdf E:\netcdf\ncdump\gpi_2000001-2013120 {
> dimensions:
>  ndays = 1581 ;
>  nkp = 8 ;
> variables:
>  int year_day(ndays) ;
>   year_day:long_name = "4-digit year followed by 3-digit day" ;
>  double f107d(ndays) ;
>   f107d:long_name = "daily 10.7 cm solar flux" ;
>  double f107a(ndays) ;
>   f107a:long_name = "81-day average 10.7 cm solar flux" ;
>  double kp(ndays, nkp) ;
>   kp:long_name = "3-hourly kp index" ;
> There is only 2 terms in "dimensions":ndays and nkp. The "Data" of this two
> netcdf file is similar.Is there any way for mathematica to create netcdf file
> like the second example? Or is there any software may do this easily?
> The .nc file is maded for TIEGCM running.
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**********************
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Government or NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division
Southwest Fisheries Science Center
1352 Lighthouse Avenue
Pacific Grove, CA 93950-2097

e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address)
voice: (831)-648-9029
fax: (831)-648-8440
www: http://www.pfeg.noaa.gov/

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```
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