pass 3D Matrix from matlab to C mex- file

[Brian Blais]

On Dec 19, 2007, at Dec 19:5:07 AM, baavour at gmail.com wrote:

> help please
>
> how can i pass 3d matrix from matlab to c
>
> using mex file
>
> thanks
> --  
> http://mail.python.org/mailman/listinfo/python-list


wrong mailing list, you might want to try the matlab news group. but,  
to answer your question, mex files all have the same syntax:

void mexFunction(
                  int nlhs,        /* number of expected outputs */
                  mxArray *plhs[], /* mxArray pointer array returning  
outputs */
                  int nrhs,        /* number of inputs */
                  const mxArray *prhs[]  /* mxArray pointer array for  
inputs */
                  )


no matter what type of array you pass.  you then need to get the data  
pointer, the sizes for the arrays, etc... like:


mydata  = mxGetPr(prhs[0]);
dims=mxGetDimensions(prhs[0]);
ndims=mxGetNumberOfDimensions(prhs[0]);


check out the mex documentation.

Or, you can use Python with numpy for matrices, and use Pyrex for the  
c-extensions and make your life a *lot* easier.



				bb




-- 
Brian Blais
bblais at bryant.edu
http://web.bryant.edu/~bblais


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