AMDG Peng Wang wrote:

I am a newbie of boost. Could I ask one question that how to convert BGL adjacency_matrix object into common matrix (http://www.boost.org/doc/libs/1_37_0/libs/numeric/ublas/doc/matrix.htm)? I am sorry that if the question is too simple. I have looked around but did not find a answer.

I presume that you want a 1 where there is an edge an a 0 otherwise? #include #include #include boost::numeric::ublas::matrix<double> to_ublas_matrix(const boost::adjacency_matrix<>& m) { std::size_t size = num_vertices(m); boost::numeric::ublas::matrix<double> result(size, size); BOOST_FOREACH(std::size_t row, vertices(m)) { BOOST_FOREACH(std::size_t column, vertices(m)) { result(row, column) = edge(row, column, m).second; } } return(result); } int main() { boost::adjacency_matrix<> m(5); add_edge(0, 2, m); boost::numeric::ublas::matrix<double> u(to_ublas_matrix(m)); } In Christ, Steven Watanabe