Guidance in writing mexFunction for convert.c

I have data in CSV (comma seperated value) format, i need it in the libsvm format. I found a c code to do it: http://www.csie.ntu.edu.tw/~cjlin/libsvm/faqfiles/convert.c

But i want to call this in matlab. So i need to include a mexFunction in convert.c , could anyone guide me/help me out with writing this function?

Answer 1

[James Tursa]

Try putting this at the top of the file and then mex it:

// One input argument: The Filename
int main(int argc, char **argv);
#include "mex.h"
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    int argc = 2;
    char *argv[2];
    if( nrhs == 1 && mxIsChar(prhs[0]) ) {
        argv[1] = mxArrayToString(prhs[0]);
        main(argc,argv);
        mxFree(argv[1]);
    } else {
        mexErrMsgTxt("Expected one input, the filename");
    }
}

[sidra]

Thank you James Tursa