Re: how to call a octave function from c code

[Kai Torben Ohlhus]

On Mon, Jan 6, 2014 at 3:01 PM, osamahameed <address@hidden> wrote:

can anybody please write a C code mex file???



--
View this message in context: http://octave.1599824.n4.nabble.com/how-to-call-a-octave-function-from-c-code-tp4660666p4660701.html

Sent from the Octave - General mailing list archive at Nabble.com.
_______________________________________________
Help-octave mailing list
address@hidden
https://mailman.cae.wisc.edu/listinfo/help-octave

Hi osamahameed,

I think this is what you are looking for: https://www.gnu.org/software/octave/doc/interpreter/Calling-Other-Functions-in-Mex_002dFiles.html#Calling-Other-Functions-in-Mex_002dFiles 

--------------------------------------------------

File: myMex.c

--------------------------------------------------

#include "mex.h"

void

mexFunction (int nlhs, mxArray* plhs[],

             int nrhs, const mxArray* prhs[])

{

  mexPrintf ("I have %d inputs and %d outputs\n", nrhs, nlhs);

  if (nrhs != 2 || nlhs != 1)

    mexErrMsgTxt ("Invalid function call.");

  mexCallMATLAB (nlhs, plhs, nrhs, (mxArray*) prhs, "addition");

}

--------------------------------------------------

--------------------------------------------------

File: addition.m

--------------------------------------------------

function [ z ] = addition (x, y)

  z = x + y;

end

--------------------------------------------------

>> mkoctfile -mex myMex.c

>> result = myMex (1, 2)

I have 2 inputs and 1 outputs

result =  3

HTH,

Kai