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[netCDF #AWT-354487]: NetCDF C++ Library: Write netcdf file

Hello Carole, 

Please correct me if I'm wrong, but you also submitted this question to the 
netcdf mailing list and have received an answer, correct?  Is it ok to close 
out this ticket? Or is this a different question (it appears to be the same but 
I may be mistaken).

Thanks,

-Ward

> Hello,
> 
> I have a problem with NetCDF C++ Library.
> 
> I have to write a netcdf file with 4-dimension data (providing from a
> grib file).
> 
> I use the code below:
> float values[NT][NZ][NJ][NI];
> 
> for (it = 0; it < NT; it++) {
> 
> for (iz = 0; iz < NZ; iz++) {
> 
> for (j = 0; j < NJ; j++) {
> 
> for (i = 0; i < NI; i++) {
> 
> values[it][iz][j][i] = ....;
> }
> }
> }
> }
> 
> var->set_cur(0,0,0,0); //using NcVar var
> var->put(&values[0][0][0][0], NT, NZ, NJ, NI);
> 
> This works fine, the netcdf file is correct, the data are saved
> properly. But, with this 'static' 4-dim array declaration, i am using the
> stack memory which is limited. With big data, i could have a segmentation
> fault...
> 
> So I'd like to dynamically declare the values array.
> I am using this code below:
> 
> float * values = (float *) malloc(NT*NZ*NJ*NI*sizeof(float));
> for (it...)
> for (iz ...)
> for (j ...)
> for (i...)
> values[it*NZ+iz*NJ+j*NI+i] = ....;
> 
> var->set_cur(0,0,0,0);
> var->put(values, NT, NZ, NJ, NI);
> 
> 
> In this case, a netcdf file is generated, but the data are not saved
> properly.
> 
> Do you know why this happens and how can I solve the problem?
> 
> Thanks,
> 
> Carole
> 


Ticket Details
===================
Ticket ID: AWT-354487
Department: Support netCDF
Priority: Normal
Status: Closed