Performs a deep copy
[C++]
const COper& operator =(
   const mtx_ptrs<T>& mat
);
A reference to a mtx_ptrs<T> object.
This operator assigns the size and contents of the argument to the 
            mtx_ptrs<T> object. 
            If the mtx_ptrs<T> already contains data, 
            then it will be cleared before the assignment.
Header: plemtx.h