| // Copyright Gunter Winkler 2004 - 2009. |
| // Distributed under the Boost Software License, Version 1.0. |
| // (See accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| |
| |
| #include <iostream> |
| |
| #include <boost/numeric/ublas/matrix.hpp> |
| #include <boost/numeric/ublas/triangular.hpp> |
| |
| #include <boost/numeric/ublas/io.hpp> |
| |
| using std::cout; |
| using std::endl; |
| |
| |
| |
| namespace ublas = boost::numeric::ublas; |
| |
| |
| int main(int argc, char * argv[] ) { |
| |
| ublas::matrix<double> M (3, 3); |
| for (std::size_t i=0; i < M.data().size(); ++i) { M.data()[i] = 1+i ; } |
| |
| std::cout << "full M = " << M << "\n" ; |
| |
| ublas::triangular_matrix<double, ublas::lower> L; |
| ublas::triangular_matrix<double, ublas::unit_lower> UL; |
| ublas::triangular_matrix<double, ublas::strict_lower> SL; |
| |
| L = ublas::triangular_adaptor<ublas::matrix<double>, ublas::lower> (M); |
| SL = ublas::triangular_adaptor<ublas::matrix<double>, ublas::strict_lower> (M); |
| UL = ublas::triangular_adaptor<ublas::matrix<double>, ublas::unit_lower> (M); |
| |
| std::cout << "lower L = " << L << "\n" |
| << "strict lower SL = " << SL << "\n" |
| << "unit lower UL = " << UL << "\n" ; |
| |
| ublas::triangular_matrix<double, ublas::upper> U; |
| ublas::triangular_matrix<double, ublas::unit_upper> UU; |
| ublas::triangular_matrix<double, ublas::strict_upper> SU; |
| |
| U = ublas::triangular_adaptor<ublas::matrix<double>, ublas::upper> (M); |
| SU = ublas::triangular_adaptor<ublas::matrix<double>, ublas::strict_upper> (M); |
| UU = ublas::triangular_adaptor<ublas::matrix<double>, ublas::unit_upper> (M); |
| |
| std::cout << "upper U = " << U << "\n" |
| << "strict upper SU = " << SU << "\n" |
| << "unit upper UU = " << UU << "\n" ; |
| |
| std::cout << "M = L + SU ? " << ((norm_inf( M - (L + SU) ) == 0.0)?"ok":"failed") << "\n"; |
| std::cout << "M = U + SL ? " << ((norm_inf( M - (U + SL) ) == 0.0)?"ok":"failed") << "\n"; |
| |
| } |
| |
| |