MATLAB: Incompatible type with mxCreateNumericArray

Question

Hi, I'm trying to create a mexfunction but I have some problems with compilation… I wrote this piece of code:

//global variables int Y_dimx,Y_dimy,Y_dimz,nS; double *Y;

mexfunction() {

mxArray* dim = mxGetField(prhs[0],0,"dim");

double* Y_dim=(double*) mxGetData(dim);

Y_dimx = Y_dim[0];

Y_dimy = Y_dim[1];

Y_dimz = Y_dim[2];

nS = 72;

const int outDims[4] = {nS,Y_dimx,Y_dimy,Y_dimz};

plhs[0] = mxCreateNumericArray(4,outDims,mxDOUBLE_CLASS,mxREAL); (*)

Y = (double*)mxGetData(plhs[0]);

At line (*) I get the following compilation error: argument of type "const int *" is incompatible with parameter of type "const size_t * '

I can't understand the reason for this error… Can you help me? Thank you very much.. Davide

Answer 1

It is complaining because you declared outDims as an int array (which when used as an argument gets converted to const int *), but the function expected something else (const size_t *). Use an mwSize for this to be generic. Try this:

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    :
const mwSize outDims[4] = {nS,Y_dimx,Y_dimy,Y_dimz};