Let us say you have an old variable and you want to re-initialize it to view some other data. For this task, you can use the member function reference():

#include <rw/math/mathvec.h> int main() { RWMathVec<double> a, b, c; . . . a.reference(b + c); }

This produces exactly the same results as:

#include <rw/math/mathvec.h> int main() { RWMathVec<double> b, c; . . . RWMathVec<double> a = b + c; }