mexCallMATLAB ... Help me please.

Hi Everyone I am new in this. Let me ask you a dumb question about MEX routines.

I am trying to implement mexCallMATLAB(1, &B, 1, &A, "floor"); inside a routine, but I cannot figure out how to setup B and A as any number. I have tried everything but I have not had good results. This is the code. I need B as an input to other calculations at the end. But it seems that I am not getting anything from mexCallMATLAB.

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) {

   mxArray *A, *B;
   double *d;
           d = (double*)mxMalloc(1 * sizeof( double ));
           A = mxCreateNumericMatrix(0, 0, mxDOUBLE_CLASS, mxREAL);
           d[0] = 3.123;
           mxSetData(A, d);
                        mexCallMATLAB(1, &B, 1, &A, "floor");
                        plhs[0] = B;

..... More code....}

Answer 1

[James Tursa]

      mxArray *A;
      double *d;
      A = mxCreateNumericMatrix(1, 1, mxDOUBLE_CLASS, mxREAL);
      d = mxGetPr(A);
      d[0] = 3.123;
      mexCallMATLAB(1, plhs, 1, &A, "floor");