Mat_VarReadNext (3) - Linux Manuals

Mat_VarReadNext: Reads the information and data for the next variable in a MATLAB MAT file.

NAME

Mat_VarReadNext - Reads the information and data for the next variable in a MATLAB MAT file.

SYNOPSIS

Fd #include <matio.h> Ft matvar_t * Fo Mat_VarReadNext Fa mat_t *mat Fc

DESCRIPTION

The Fn Mat_VarReadNext function reads the information and data for the next variable stored in the open MAT file.

RETURN VALUES

If there is another variable in the MAT file and is read successfully, a pointer to the MATLAB variable structure is returned. If there are no more variables, or there was an error reading the variable, NULL is returned.

EXAMPLES

This example program opens a MAT file named by the first argument to the program, and uses Fn Mat_VarReadNext to read each variable in the file. For each variable read, the Mat_VarPrint3 function is used to display the information and data of the variable.

#include <stdlib.h>
#include <stdio.h>
#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 %s,argv[1]);
        return EXIT_FAILURE;
    }

    while ( NULL != (matvar = Mat_VarReadNext(matfp)) ) {
        Mat_VarPrint(matvar,1);
        Mat_VarFree(matvar);
    }

    Mat_Close(matfp);
    return EXIT_SUCCESS;
}