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MAT_VARREADINFO(3) Library Functions Manual MAT_VARREADINFO(3)

NAME

Mat_VarReadInfo
Reads the information for a specific variable in a MATLAB MAT file.

SYNOPSIS

#include <matio.h>

matvar_t *
Mat_VarReadInfo(mat_t *matfp, const char *name);

DESCRIPTION

The Mat_VarReadInfo() function reads the information for the variable name in the open MAT file.

RETURN VALUES

If the variable was found in the MAT file and the information about the variable successfully read, a pointer to the MATLAB variable structure is returned. If the variable was not found, or there was an error reading the variable information, NULL is returned.

EXAMPLES

#include "matio.h"

int
main(int argc, char **argv)
{
    mat_t    *matfp;
    matvar_t *matvar;

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

    matvar = Mat_VarReadInfo(matfp, "x");
    if ( NULL != matvar ) {
        Mat_VarPrint(matvar);
        Mat_VarFree(matvar);
    }

    Mat_Close(matfp);
    return EXIT_SUCCESS;
}

SEE ALSO

Mat_VarRead(3), Mat_VarReadNextInfo(3), Mat_VarPrint(3)
September 12, 2019 Linux 4.19.0-12-amd64