NAME¶
Mat_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 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)