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MAT_VARWRITE(3)       DragonFly Library Functions Manual       MAT_VARWRITE(3)

NAME
     Mat_VarWrite - Writes a MATLAB variable to a MATLAB MAT file.

SYNOPSIS
     #include <matio.h>

     int
     Mat_VarWrite(mat_t *mat, matvar_t *matvar,
         enum matio_compression compress);

DESCRIPTION
     The Mat_VarWrite() function writes the MATLAB variable matvar to the MAT
     file mat which must be opened for writing. If the MAT file is a level 5
     MAT file, the compress option allows the variable to be written using
     zlib compression if available. If compression is not available, the
     variable is written uncompressed.

RETURN VALUES
     The function returns 0 if the variable was successfully written to the
     MAT file.  otherwise, an error value is returned.

EXAMPLES
     This example program creates a MAT file named by the first argument to
     the program, and writes the variable named m_pi to the file.

     #include <math.h>
     #include "matio.h"

     int
     main(int argc,char **argv)
     {
         mat_t    *matfp;
         matvar_t *matvar;
         size_t    dims[2] = {1,1};
         double    m_pi = M_PI;

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

         matvar = Mat_VarCreate("m_pi",MAT_C_DOUBLE,MAT_T_DOUBLE,2,dims,&m_pi,0);
         if ( NULL != matvar ) {
             Mat_VarWrite(matfp,matvar,MAT_COMPRESSION_ZLIB);
             Mat_VarFree(matvar);
         }

         Mat_Close(matfp);
         return EXIT_SUCCESS;
     }

SEE ALSO
     Mat_CreateVer(3), Mat_Open(3), Mat_VarRead(3)

DragonFly 6.5-DEVELOPMENT       March 18, 2012       DragonFly 6.5-DEVELOPMENT