Re: how to add the many netcdf files

["Yogesh K. Tiwari" <Yogesh.Tiwari@xxxxxxxxxxxxxxx>]

Hi Ansley,

Many thanks for the helping hand,

It works now after doing :

cancel data input_file.cdf
cancel memory

After each input file.

Also I made descriptor file with the help of Steve, and this too works.

Thanks Ansley,

Thanks Steve,

Cheers,
Yogesh


 Manke wrote:
> Hi Yogesh,
> Let's see if we can work out a solution and then post it back to the Users
> List.
>
> There should not be a problem appending 50 files of this size.  While there
> is an upper limit on NetCDF file sizes of 2GB (which we are working
> to overcome), 32*762K does not bring us anywhere near that limit.
>
> Try closing the input files after you read each one; that is:
>
>  use input_file.cdf
>  LIST/FORMAT=CDF/file=concat.cdf NBOX,CO2,STD_CO2
>  cancel data input_file.cdf
>  cancel memory   ! (I don't know whether this makes a difference)
>   ...
>
> Or, exit Ferret and restart a new session, continuing to open
> files and append their data to your concat.cdf.
>
> Does the file that you're able to write, with 32 of your time steps,
> seem to be correct, with the correct time axis?
>
> Ansley
>
>
> Yogesh K. Tiwari wrote:
>
> > Hello Ansley,
> >
> > I used the second option, as you suggested, SAVE/APPEND command to add 
> > 50 netcdf files in to a single 'concat.cdf' file.
> >
> > My each file size is 762K.
> >
> > After adding only first 32 files ferret crashes on the following error:
> >
> > !--------------------------------------------------------------
> > add_connect: too many connects, cannot add another
> >  ** netCDF error: Attribute not found
> >  could not open CDF output file:
> >  concat.cdf
> > LIST/FORMAT=CDF/file=concat.cdf NBOX,CO2,STD_CO2
> > Command file, command group, or REPEAT execution aborted
> > !-----------------------------------------------------------
> >
> >
> > Please help,
> >
> > Thanks,
> >
> > Yogesh
> >
> >
> > > Hello Yogesh,
> > > This FAQ addresses a very similar question, and gives two different
> > > options; one is the descriptor file suggested by Steve Cousins in his
> > > earlier reply, and the other is to use Ferret's SAVE/APPEND command
> > > to make a single NetCDF file.
> > >
> > >   
> > > http://www.ferret.noaa.gov/Ferret/FAQ/data_management/multi_dataset.html
> > >
> > > Ansley Manke
> > >
> > > Yogesh K. Tiwari wrote:
> > >
> > > > Hello Dear Friends,
> > > >
> > > > I want to add  many  netcdf files in a one file inside ferret.
> > > >
> > > > My data files looks like :
> > > >
> > > > 1>./Data_Jan_1987.nc
> > > >
> > > > name     title                   I         J         K         L
> > > > CO2      CO2 concentration      1:360     1:180     ...       1:1
> > > >
> > > >
> > > > 2>./Data_Feb_1987.nc
> > > >
> > > > name     title                   I         J         K         L
> > > > CO2      CO2 concentration      1:360     1:180     ...       1:1
> > > >
> > > >
> > > >
> > > > 3>./Data_March_1987.nc
> > > >
> > > > name     title                   I         J         K         L
> > > > CO2      CO2 concentration      1:360     1:180     ...       1:1
> > > >
> > > >
> > > > -------------------------
> > > > -----------------
> > > > -------------
> > > >
> > > > There are many months for many years, total 50 files ----------------
> > > > --------------------------------------
> > > > --------------
> > > >
> > > >
> > > >
> > > > I want to add all the files in a single file so it should look like :
> > > >
> > > > >./Data_added.nc
> > > >
> > > > name     title                 I         J         K         L
> > > > CO2      CO2 concentration    1:360     1:180     ...       1:50
> > > >
> > > > Is it possible ??
> > > >
> > > > Or is there any other way that I can use all the files and plot 
> > > > timeseries - seasonal cycle and other features.
> > > >
> > > > Thanks for your help,
> > > >
> > > > Regards,
> > > > Yogesh


--

=================================================================
Yogesh K. Tiwari,
Max-Planck Institute for Biogeochemistry,
Hans-Knoell-Strasse 10, D-07745 Jena,         Postal Address:
Germany                                       Postfach 10 01 64
                                              D-07701 Jena,
Office   : +49 3641 576376                    Germany
Fax      : +49 3641 577300
Home     : +49 3641 672232
Mobile   : +49 1736988789
e-mail   : yogesh.tiwari@bgc-jena.mpg.de
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