NAME

       Mat_Rewind — Rewind an open .mat file to the beginning

SYNOPSIS

       #include <matio.h>

       int
       Mat_Rewind(mat_t *matfp);

DESCRIPTION

       Rewinds  an  open .mat file so that Mat_VarReadNext(3) or Mat_VarReadNextInfo(3) reads the first variable
       in the file.

RETURN VALUES

       The function returns 0 on success, or -1 on failure.

EXAMPLES

       The following example shows a list of variables in the MAT file, and prompts the user for  the  index  of
       the  variale to read. If the index is valid, the file is reset to the beginning, and variables read until
       the selected index is reached.

       #include <stdlib.h>
       #include <stdio.h>
       #include "matio.h"

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

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

           idx = 0;
           while ( NULL != (matvar = Mat_VarReadNextInfo(matfp)) ) {
               idx++;
               printf("%3d. %s0,idx,matvar->name);
               Mat_VarFree(matvar);
           }
           num_variables = idx;
           if ( num_variables > 0 ) {
               printf("Which variable would you like to read? ");
               if ( 0 == fscanf(stdin,"%d",&idx) ) {
                   printf("Invalid variable selection!0);
               } else if ( idx < 1 || idx > num_variables ) {
                   fprintf(stderr,"That is an invalid variable index!0);
               } else {
                   int k;
                   Mat_Rewind(matfp);
                   for ( k = 1; k < idx; k++ ) {
                       matvar = Mat_VarReadNextInfo(matfp);
                       Mat_VarFree(matvar);
                   }
                   matvar = Mat_VarReadNext(matfp);
                   Mat_VarPrint(matvar,1);
                   Mat_VarFree(matvar);
               }
           }

           Mat_Close(matfp);
           return EXIT_SUCCESS;
       }

SEE ALSO

       Mat_Open(3), Mat_Close(3), Mat_VarReadNext(3), Mat_VarReadNextInfo(3)

Debian                                           April 21, 2011                                    MAT_REWIND(3)