I’m writing a MEX file in C where I need to duplicate an mxArray in the code. What I’m currently doing is this:
plhs[0] = mxCreateDoubleMatrix(n, p, mxREAL);
C = mxGetPr(plhs[0]);
…
…
in = mxDuplicateArray(plhs[0]);
a = mxGetPr(in);
…
I’m creating a double mxArray and storing it as the first output to Matlab: plhs[0]. I then get the pointer to it called C and perform my calculations on that. A bit later in the code I need to make a copy of C, which works great by calling mxDuplicateArray on the plhs[0].
However, I would like to do the same thing but avoid placing C as a Matlab output ( plhs).
So instead I would like to be able to do something like this:
C = mxGetPr(mxCreateDoubleMatrix(n, p, mxREAL));
…
…
in = mxDuplicateArray(C);
a = mxGetPr(in);
…
But doing that does not work and makes Matlab crash. Can anyone advise me on how I should write it instead? I’m sure there is a very trivial solution to my problem, I’m just very unfamiliar with how to use the MEX functions.
Thanks.
