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MAT_VARREADNEXT(3) FreeBSD Library Functions Manual MAT_VARREADNEXT(3)

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

#include <matio.h>
matvar_t *
Mat_VarReadNext(mat_t *matfp);

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

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.

This example program opens a MAT file named by the first argument to the program, and uses Mat_VarReadNext() to read each variable in the file. For each variable read, the Mat_VarPrint(3) 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 %s0,argv[1]); 
        return EXIT_FAILURE; 
    } 
 
    while ( NULL != (matvar = Mat_VarReadNext(matfp)) ) { 
        Mat_VarPrint(matvar,1); 
        Mat_VarFree(matvar); 
    } 
 
    Mat_Close(matfp); 
    return EXIT_SUCCESS; 
}

Mat_VarRead(3), Mat_VarReadNextInfo(3), Mat_VarPrint(3)
April 21, 2011 FreeBSD 12.0-RELEASE

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