- m->set_attribute ("i", lexical_cast<string> (i));
- m->set_attribute ("j", lexical_cast<string> (j));
- m->add_child_text (lexical_cast<string> (matrix (i, j)));
+ m->set_attribute ("i", raw_convert<string> (i));
+ m->set_attribute ("j", raw_convert<string> (j));
+ m->add_child_text (raw_convert<string> (matrix (i, j)));