7

我的问题基于：如何打印显示单个属性的图表

我正在使用捆绑的属性：

 typedef struct vert{
   std::string name;
 };

 typedef struct edge{
   int capacity;
   int weight;
 }; 

typedef adjacency_list<listS, vecS, undirectedS, vert, edge> Graph;
Graph g;
vector<int,int> ele;

我在一个应该创建边缘的循环中调用了以下内容：

  edge prop;
  prop.weight = 5;
  prop.capacity = 4;
  add_edge(ele.first,ele.second, prop, g);

该段是将图形打印为点格式的部分。

ofstream dot("graph.dot");
write_graphviz(dot, g, 
  boost::make_label_writer(boost::get(&vert::name, g)),
  boost::make_label_writer(boost::get(&edge::weight, g)),
  boost::make_label_writer(boost::get(&edge::capacity, g)));

错误是：

/usr/include/boost/graph/graphviz.hpp: In function ‘void boost::write_graphviz(std::ostream&, const Graph&, VertexPropertiesWriter, EdgePropertiesWriter, GraphPropertiesWriter, VertexID) [with Graph = boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS, vert, edge, boost::no_property, boost::listS>, VertexPropertiesWriter = boost::label_writer<boost::bundle_property_map<boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS, vert, edge, boost::no_property, boost::listS>, long unsigned int, vert, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, EdgePropertiesWriter = boost::label_writer<boost::bundle_property_map<boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS, vert, edge, boost::no_property, boost::listS>, boost::detail::edge_desc_impl<boost::undirected_tag, long unsigned int>, edge, int> >, GraphPropertiesWriter = boost::label_writer<boost::bundle_property_map<boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS, vert, edge, boost::no_property, boost::listS>, boost::detail::edge_desc_impl<boost::undirected_tag, long unsigned int>, edge, int> >, VertexID = boost::vec_adj_list_vertex_id_map<boost::property<boost::vertex_bundle_t, vert, boost::no_property>, long unsigned int>]’:
/usr/include/boost/graph/graphviz.hpp:260:   instantiated from ‘void boost::write_graphviz(std::ostream&, const Graph&, VertexPropertiesWriter, EdgePropertiesWriter, GraphPropertiesWriter) [with Graph = Graph, VertexPropertiesWriter = boost::label_writer<boost::bundle_property_map<boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS, vert, edge, boost::no_property, boost::listS>, long unsigned int, vert, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >, EdgePropertiesWriter = boost::label_writer<boost::bundle_property_map<boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS, vert, edge, boost::no_property, boost::listS>, boost::detail::edge_desc_impl<boost::undirected_tag, long unsigned int>, edge, int> >, GraphPropertiesWriter = boost::label_writer<boost::bundle_property_map<boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS, vert, edge, boost::no_property, boost::listS>, boost::detail::edge_desc_impl<boost::undirected_tag, long unsigned int>, edge, int> >]’
file_format.cc:194:   instantiated from here
/usr/include/boost/graph/graphviz.hpp:236: error: no match for call to ‘(boost::label_writer<boost::bundle_property_map<boost::adjacency_list<boost::listS, boost::vecS, boost::undirectedS, vert, edge, boost::no_property, boost::listS>, boost::detail::edge_desc_impl<boost::undirected_tag, long unsigned int>, edge, int> >) (std::basic_ostream<char, std::char_traits<char> >&)’

这对我来说很奇怪，因为这有效：

write_graphviz(dot, g,
  boost::make_label_writer(boost::get(&vert_info::name, g)));

并输出以下内容：

graph G {
0[label="0"];
1[label="1"];
2[label="2"];
3[label="3"];
4[label="4"];
5[label="5"];
6[label="6"];
7[label="7"];
8[label="8"];
9[label=""];  // this is another problem that I will have to fix but beside the point
0--9 ;
0--5 ;
0--2 ;
0--1 ;
...
...
}

我的目标是标记每个节点，并标记每个边缘的容量和权重。

4

1 回答 1

14

你可以在这里找到所有重载的列表write_graphviz。第一个错误的原因是您尝试使用的重载在其第五个参数中需要一个图形属性编写器。

辅助函数make_label_writer简单地创建一个属性编写器，将单个属性从图的顶点或边分配给名为 的graphviz 顶点或边属性label。

为了实现您想要的，您需要创建一个自定义property writer项，在该自定义项中将每个边缘属性分配给您需要的graphviz 属性。我个人会使用weight->label和capacity->taillabel或headlabel.

template <class WeightMap,class CapacityMap>
class edge_writer {
public:
  edge_writer(WeightMap w, CapacityMap c) : wm(w),cm(c) {}
  template <class Edge>
  void operator()(ostream &out, const Edge& e) const {
    out << "[label=\"" << wm[e] << "\", taillabel=\"" << cm[e] << "\"]";
  }
private:
  WeightMap wm;
  CapacityMap cm;
};

template <class WeightMap, class CapacityMap>
inline edge_writer<WeightMap,CapacityMap> 
make_edge_writer(WeightMap w,CapacityMap c) {
  return edge_writer<WeightMap,CapacityMap>(w,c);
}

最后，您的write_graphviz调用将只是：

ofstream dot("graph.dot");
write_graphviz(dot, g, 
  boost::make_label_writer(boost::get(&vert::name, g)),
  make_edge_writer(boost::get(&edge::weight,g),boost::get(&edge::capacity,g)));
于 2012-07-07T07:57:22.177 回答