MATLAB: Passing argument 2 of ‘mxCreateNumericArray’ from incompatible pointer type

mex

Hi,
I am trying to develop a software and when I compile I have the following warning:
  sin_reg.c:72:2: attention : passing argument 2 of 'mxCreateNumericArray' from incompatible pointer type [enabled by default]
  In file included from /usr/local/R2011b/extern/include/mex.h:58:0,
           from nmsimplex.h:33,
           from sin_reg.c:2:
  /usr/local/R2011b/extern/include/matrix.h:891:19: note: expected 'const mwSize *' but argument is of type 'int *'
The code is the following:
  mwSize volume_dims2[3];
  volume_dims2[0] = n_y;
  volume_dims2[1] = 0;
  volume_dims2[2] = n_x;
  volume_dims2[3] = 0;
  volume_dims2[4] = (mwSize) 2;
  volume_dims2[5] = 0;
  plhs[0] = mxCreateNumericArray((mwSize) 3, volume_dims2, mxDOUBLE_CLASS, mxREAL);
What is wrong?
Thank you for your help, Cédric

Best Answer

Maybe you have inadvertantly redefined mwSize. Do you have the following statement somewhere at the top of your code?
#define mwSize int
This could have been used to support earlier versions of MATLAB that do not have a typedef for mwSize, for example. If so, you can get rid of it or wrap it as follows:
#ifndef MWSIZE_MAX
#define mwSize int
#endif
Also, you have only declared volume_dims2 to have 3 elements, but you are stuffing values into 6 elements ... writing beyond the array bounds which will probably result in a crash. And additionally, it looks rather weird that you are stuffing 0 into some of the elements ... is that what you really intended?
Related Question