Re: [netcdfgroup] Fw: NcVar put method

• To: salah jubeh <s_jubeh@xxxxxxxxx>
• Subject: Re: [netcdfgroup] Fw: NcVar put method
• From: Cedric Roux <cedric.roux@xxxxxxxxxx>
• Date: Wed, 10 Nov 2010 08:26:36 +0100

On 11/09/2010 04:48 PM, salah jubeh wrote:

Sorry for sending this a gain


----- Forwarded Message ----

From: salah jubeh<s_jubeh@xxxxxxxxx>
To: support-netcdf@xxxxxxxxxxxxxxxx
Sent: Mon, November 8, 2010 12:58:41 PM
Subject: NcVar put method


I am trying to use this method signature -NcBool put(const ....*   vals, const
long* counts)-; but I have a problem  , can some one please tell me what is my
mistake .

Why - data->put(&dataOut[0],*dim);-  is not working. Please see the code.


#include<iostream>
#include<netcdfcpp.h>

using namespace std;

// We are writing 2D data, a 6 x 12 grid.
static const int NDIMS = 2;
static const int NX = 6;
static const int NY = 12;

// Return this in event of a problem.
static const int NC_ERR = 2;

int main(void)
{
    // Different ways to write arrays

    int  dataOut[NX * NY];
    int dataOut2[NX] [NY];

    // Create some pretend data. Note that dataOut and dataOut2 are
identical...!!!
    for(int i = 0; i<  NX; i++)
       for(int j = 0; j<  NY; j++){
      dataOut[i * NY +j] = (i+1) * (j+1);
      dataOut2[i][j] = (i+1) * (j+1);
     }


    // Create the file.
    NcFile dataFile("simple_xy.nc", NcFile::Replace);

    if (!dataFile.is_valid())
    {
       cout<<  "Couldn't open file!\n";
       return NC_ERR;
    }

    NcDim* xDim = dataFile.add_dim("x", NX);
    NcDim* yDim = dataFile.add_dim("y", NY);


   const NcDim* all[2] ;
    all[0]  = xDim;
    all[1] = yDim;

    int *dim;
    dim = new int[2];
    dim[0] = 6;
    dim[1] = 12;

    NcVar *data = dataFile.add_var("data", ncInt, 2, all);
    NcVar *data2 = dataFile.add_var("data2", ncInt, 2, all);

    // This works fine and data and data2 are identical
    // data->put(&dataOut[0],NX, NY);
    data2->put(&dataOut2[0][0], NX, NY);

   // try to use another signature

    data->put(&dataOut[0],*dim); //nothing is written

what about:

long dim[2];
dim[0] = 6;
dim[1] = 12;
data->put(&dataOut[0],dim);
(using a long instead of an int and passing "dim" instead of "*dim")

I'm not sure of that, just try.

HTH
Cédric

  cout<<  "*** SUCCESS writing example file simple_xy.nc!"<<  endl;

    return 0;
}






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• References:
  • [netcdfgroup] Fw: NcVar put method
    • From: salah jubeh