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Man Pages


Manual Reference Pages  -  MAT_VARREAD (3)

NAME

Mat_VarRead - Reads the information and data for a specific variable in a MATLAB MAT file.

CONTENTS

Synopsis
Description
Return Values
Examples
See Also

SYNOPSIS


.Fd #include <matio.h> matvar_t *
.Fo Mat_VarRead mat_t *mat const char *name
.Fc

DESCRIPTION

The Mat_VarRead function reads the information and data for the variable name in the open MAT file.

RETURN VALUES

If the variable was found in the MAT file and 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, NULL is returned.

EXAMPLES

This example program opens a MAT file named by the first argument to the program, and reads a variable named x from the file. The MATIO function Mat_VarPrint is used to print the information and data from the file.
#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_VarRead(matfp,"x"); if ( NULL != matvar ) { Mat_VarPrint(matvar); Mat_VarFree(matvar); }

Mat_Close(matfp); return EXIT_SUCCESS; }

SEE ALSO

Mat_VarReadInfo(3), Mat_VarReadNext(3), Mat_VarPrint(3)
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