1MAT_VARREADNEXT(3)       BSD Library Functions Manual       MAT_VARREADNEXT(3)
2

NAME

4     Mat_VarReadNext — Reads the information and data for the next variable in
5     a MATLAB MAT file.
6

SYNOPSIS

8     #include <matio.h>
9
10     matvar_t *
11     Mat_VarReadNext(mat_t *matfp);
12

DESCRIPTION

14     The Mat_VarReadNext() function reads the information and data for the
15     next variable stored in the open MAT file.
16

RETURN VALUES

18     If there is another variable in the MAT file and is read successfully, a
19     pointer to the MATLAB variable structure is returned.  If there are no
20     more variables, or there was an error reading the variable, NULL is re‐
21     turned.
22

EXAMPLES

24     This example program opens a MAT file named by the first argument to the
25     program, and uses Mat_VarReadNext() to read each variable in the file.
26     For each variable read, the Mat_VarPrint(3) function is used to display
27     the information and data of the variable.
28
29     #include <stdlib.h>
30     #include <stdio.h>
31     #include "matio.h"
32
33     int
34     main(int argc, char **argv)
35     {
36         mat_t    *matfp;
37         matvar_t *matvar;
38
39         matfp = Mat_Open(argv[1], MAT_ACC_RDONLY);
40         if ( NULL == matfp ) {
41             fprintf(stderr, "Error opening MAT file %s0, argv[1]);
42             return EXIT_FAILURE;
43         }
44
45         while ( NULL != (matvar = Mat_VarReadNext(matfp)) ) {
46             Mat_VarPrint(matvar, 1);
47             Mat_VarFree(matvar);
48         }
49
50         Mat_Close(matfp);
51         return EXIT_SUCCESS;
52     }
53

SEE ALSO

55     Mat_VarRead(3), Mat_VarReadNextInfo(3), Mat_VarPrint(3)
56
57BSD                           September 12, 2019                           BSD
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