Hi, I have a ublas vector (or it can be std::vector also). Where I want to perform certain operation as a rotating basis. The program below illustrates it. std::vector<int> v; v+=1,2,3,4,5,6,7,8,9; ublas::vector<int> v1(v.size()); std::copy(v.begin(),v.end(),v1.begin()); std::cout<