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- // 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";
- }
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