Mat_VarCreateStruct (3) - Linux Manuals
Mat_VarCreateStruct: Creates a structure variable.
NAME
Mat_VarCreateStruct - Creates a structure variable.SYNOPSIS
Fd #include <matio.h> Ft matvar_t * Fo Mat_VarCreateStruct Fa const char *name Fa int rank Fa size_t *dims Fa const char **fields Fa unsigned nfields FcDESCRIPTION
The Fn Mat_VarCreateStruct function creates a structure variable named Fa name that can be written to a MAT file.RETURN VALUES
If the structure variable was successfully created, a pointer to the variable is returned. Otherwise NULL is returned. The structure variable pointer should be free'd when no longer needed using Mat_VarFree3 . The names of the fields are copied in the function, and thus should be released after calling the function if necessary.EXAMPLES
This example program opens a MAT file named by the first argument to the program, and writes a structure named a to the file.#include "matio.h" int main(int argc,char **argv) { mat_t *matfp; matvar_t *matvar; matvar_t *field; const char *fields[2] = {"field1","field2"}; double data1 = 1, data2 = 2; size_t dims[2] = {1, 1}; matfp = Mat_Open(argv[1],MAT_ACC_RDWR); if ( NULL == matfp ) { fprintf(stderr,"Error opening MAT file %s,argv[1]); return EXIT_FAILURE; } dims[0] = 1; dims[1] = 1; matvar = Mat_VarCreateStruct("a",2,dims,fields,2); if ( NULL == matvar ) { Mat_Close(matfp); return EXIT_FAILURE; } field = Mat_VarCreate(NULL,MAT_C_DOUBLE,MAT_T_DOUBLE,2,dims,&data1, MAT_F_DONT_COPY_DATA); Mat_VarSetStructFieldByName(matvar, "field1", 0, field); field = Mat_VarCreate(NULL,MAT_C_DOUBLE,MAT_T_DOUBLE,2,dims,&data2, MAT_F_DONT_COPY_DATA); Mat_VarSetStructFieldByName(matvar, "field2", 0, field); Mat_VarWrite(matfp,matvar,MAT_COMPRESSION_NONE); Mat_VarFree(matvar); Mat_Close(matfp); return EXIT_SUCCESS; }
SEE ALSO
Mat_VarCreate3, Mat_VarSetStructFieldByName3