sorted fusion of vectors
[ind]=fusvect(arg1,...,argn)
* arg1,...,argn = (n x 1) vectors
* ind = a (n x 1) vector
fusvect([1 ;4 ; 5],[3 ; 2 ;4]) // Returns: //! 1. ! //! 2. ! //! 3. ! //! 4. ! //! 4. ! //! 5. !