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Meththa wrote: I want to use the Kamada Kawai spring layout algorithm and I do not know what to pass for the final parameter when calling the function. the template of the function is given below.

*template*<*typename* Graph, *typename* PositionMap, *typename* WeightMap, *typename* T, *bool* EdgeOrSideLength> *bool* kamada_kawai_spring_layout(*const* Graph & g, PositionMap position, WeightMap weight, /unspecified/ edge_or_side_length); I do not understand what value needs to be given and what type for /unspecified edge_or_side_length./ // Can someone please point me in the right direction with regards to this.

If you want the side of the bounding box to be of length "s", pass boost::side_length(s) If you want the "normal" edge length to be e, pass boost::edge_length(e).

- Doug

Is the bouding box the placement area? I tried both ways you have suggested above and i can't seem to get rid of the compiler errors. If I leave boost::side_length(s) as it is, the compiler complains 's' is not instantiated. If I give a value instead of 's', it complains as follows. C:/boost_1_34_1/boost/graph/kamada_kawai_spring_layout.hpp: In function `bool boost::kamada_kawai_spring_layout(const Graph&, PositionMap, WeightMap, boost::detail::graph::edge_or_side<EdgeOrSideLength, T>) [with Graph = Graph, PositionMap = boost::iterator_property_map<__gnu_cxx::__normal_iterator<boost::simple_point<double>*, std::vector<boost::simple_point<double>, std::allocator<boost::simple_point<double> > > >, boost::vec_adj_list_vertex_id_map<boost::no_property, size_t>, boost::simple_point<double>, boost::simple_point<double>&>, WeightMap = boost::adj_list_edge_property_map<boost::undirected_tag, boost::detail::error_property_not_found, boost::detail::error_property_not_found&, size_t, boost::no_property, boost::edge_weight_t>, T = int, bool EdgeOrSideLength = false]': main2.cpp:57: instantiated from here C:/boost_1_34_1/boost/graph/kamada_kawai_spring_layout.hpp:535: no matching function for call to `boost::detail::error_property_not_found:: error_property_not_found(double)' Can you shed some light on this please. Thanks - Meththa ____________________________________________________________________________________ Be a better Globetrotter. Get better travel answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=list&sid=396545469