MAT_VARREAD(3) BSD Library Functions Manual MAT_VARREAD(3)NAMEMat_VarRead — Reads the information and data for a specific variable in a
MATLAB MAT file.
SYNOPSIS
#include <matio.h>
matvar_t *
Mat_VarRead(mat_t *mat, const char *name);
DESCRIPTION
The Mat_VarRead() function reads the information and data for the vari‐
able 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 ALSOMat_VarReadInfo(3), Mat_VarReadNext(3), Mat_VarPrint(3)BSD April 21, 2011 BSD
