hi all, i'm trying to assign a unit vector into a vector. i get puzzling results: v[3](0,0,0)//initial uv1[3](1,0,0) v[3](1,0,0) uv2[3](0,1,0) v[3](1,0,0)//should be (0,1,0) uv3[3](0,1,0) v[3](1,0,0)//should be (0,0,1) for the code below. i must be missing something obvious...what is it? #include <boost/numeric/ublas/vector.hpp> #include <boost/numeric/ublas/io.hpp> int main(){ using namespace boost::numeric::ublas; unsigned int D = 3; unit_vector<unsigned int> uv1(D,0); unit_vector<unsigned int> uv2(D,1); unit_vector<unsigned int> uv3(D,2); vector<unsigned int> v(D); std::cout << "v" << v << std::endl; copy(uv1.begin(),uv1.end(),v.begin()); std::cout << "uv1" << uv1 << std::endl; std::cout << "v" << v << std::endl; copy(uv2.begin(),uv2.end(),v.begin()); std::cout << "uv2" << uv2 << std::endl; std::cout << "v" << v << std::endl; copy(uv3.begin(),uv3.end(),v.begin()); std::cout << "uv3" << uv2 << std::endl; std::cout << "v" << v << std::endl; return 0; };