Output a matrix with c++ and mex

Question

I have a problem with my c++ code. I want to return a matrix of k-dimensions from my cpp program to Matlab.

The matrix I want to pass is stored in all_data

Answer 1

It looks like mxGetPr is returning you a pointer to an array of doubles and you are assigning it to a vector of vectors.

This should work:

double* indexes = mxGetPr(plhs[0]);