Mat_VarWrite (3) - Linux Manuals

Mat_VarWrite: Writes a MATLAB variable to a MATLAB MAT file.

NAME

Mat_VarWrite - Writes a MATLAB variable to a MATLAB MAT file.

SYNOPSIS

Fd #include <matio.h> Ft int Fo Mat_VarWrite Fa mat_t *mat Fa matvar_t *matvar Fa enum matio_compression compress Fc

DESCRIPTION

The Fn Mat_VarWrite function writes the MATLAB variable Fa matvar to the MAT file Fa 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.

RETURN VALUES

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

EXAMPLES

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 %s,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;
}