Mat_VarWrite

#include <matio.h>

int
Mat_VarWrite(mat_t *mat, matvar_t *matvar, enum matio_compression compress);

The Mat_VarWrite() function writes the MATLAB variable matvar to the MAT file mat which must be opened for writing. If the MAT file is a level 5 MAT file, the compress option allows the variable to be written using zlib compression if available. If compression is not available, the variable is written uncompressed.

The function returns 0 if the variable was successfully written to the MAT file. otherwise, an error value is returned.

This example program creates a MAT file named by the first argument to the program, and writes the variable named m_pi to the file.

#include <math.h>
#include "matio.h"

int
main(int argc,char **argv)
{
    mat_t    *matfp;
    matvar_t *matvar;
    size_t    dims[2] = {1,1};
    double    m_pi = M_PI;

    matfp = Mat_CreateVer(argv[1],NULL,MAT_FT_DEFAULT);
    if ( NULL == matfp ) {
        fprintf(stderr,"Error creating MAT file %s0,argv[1]);
        return EXIT_FAILURE;
    }

    matvar = Mat_VarCreate("m_pi",MAT_C_DOUBLE,MAT_T_DOUBLE,2,dims,&m_pi,0);
    if ( NULL != matvar ) {
        Mat_VarWrite(matfp,matvar,MAT_COMPRESSION_ZLIB);
        Mat_VarFree(matvar);
    }

    Mat_Close(matfp);
    return EXIT_SUCCESS;
}

Mat_CreateVer(3), Mat_Open(3), Mat_VarRead(3)