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MAT_VARREADNEXT(3)    DragonFly Library Functions Manual    MAT_VARREADNEXT(3)


Mat_VarReadNext - Reads the information and data for the next variable in a MATLAB MAT file.


#include <matio.h> matvar_t * Mat_VarReadNext(mat_t *mat);


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


If there is another variable in the MAT file and is read successfully, a pointer to the MATLAB variable structure is returned. If there are no more variables, or there was an error reading the variable, NULL is returned.


This example program opens a MAT file named by the first argument to the program, and uses Mat_VarReadNext() to read each variable in the file. For each variable read, the Mat_VarPrint(3) function is used to display the information and data of the variable. #include <stdlib.h> #include <stdio.h> #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; } while ( NULL != (matvar = Mat_VarReadNext(matfp)) ) { Mat_VarPrint(matvar,1); Mat_VarFree(matvar); } Mat_Close(matfp); return EXIT_SUCCESS; }


Mat_VarRead(3), Mat_VarReadNextInfo(3), DragonFly 6.5-DEVELOPMENT April 21, 2011 DragonFly 6.5-DEVELOPMENT

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