comparison DEPENDENCIES/generic/include/boost/graph/graph_stats.hpp @ 16:2665513ce2d3

Add boost headers

+// Copyright 2005 The Trustees of Indiana University.
+
+// Use, modification and distribution is subject to 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)
+
+//  Authors: Alex Breuer
+//           Andrew Lumsdaine
+#ifndef BOOST_GRAPH_GRAPH_STATS_HPP
+#define BOOST_GRAPH_GRAPH_STATS_HPP
+
+#include <map>
+#include <list>
+#include <boost/graph/iteration_macros.hpp>
+#include <boost/assert.hpp>
+
+namespace boost { namespace graph {
+
+template<typename Graph>
+struct  sort_edge_by_origin {
+public:
+  typedef typename graph_traits<Graph>::edge_descriptor edge_type;
+
+  explicit sort_edge_by_origin( Graph& g ) : g(g) {} 
+
+  inline bool operator()( edge_type a, edge_type b ) {
+    return source( a, g ) == source( b, g ) ? target( a, g ) < target( b, g ) :
+      source( a, g ) < source( b, g );
+  }
+
+private:
+  Graph& g;
+};
+
+template<typename Graph>
+struct  equal_edge {
+public:
+  typedef typename graph_traits<Graph>::edge_descriptor edge_type;
+
+  explicit equal_edge( Graph& g ) : g(g) {} 
+
+  inline bool operator()( edge_type a, edge_type b ) {
+    return source( a, g ) == source( b, g ) &&
+      target( a, g ) == target( b, g );
+  }
+
+private:
+  Graph& g;
+};
+
+template<typename Graph>
+unsigned long num_dup_edges( Graph& g ) {
+  typedef typename graph_traits<Graph>::edge_iterator e_iterator_type;
+  typedef typename graph_traits<Graph>::edge_descriptor edge_type;
+
+  std::list<edge_type> all_edges;
+  
+  BGL_FORALL_EDGES_T( e, g, Graph ) {
+    all_edges.push_back( e );
+  }
+    
+  sort_edge_by_origin<Graph> cmp1( g );
+  all_edges.sort( cmp1 );
+  equal_edge<Graph> cmp2( g );
+  all_edges.unique( cmp2 );
+
+  return num_edges( g ) - all_edges.size();
+}
+
+
+template<typename Graph>
+std::map<unsigned long, unsigned long> dup_edge_dist( Graph& g ) {
+  std::map<unsigned long, unsigned long> dist;
+  typedef typename graph_traits<Graph>::adjacency_iterator a_iterator_type;
+  typedef typename graph_traits<Graph>::vertex_descriptor vertex_type;
+
+  
+  BGL_FORALL_VERTICES_T( v, g, Graph ) {
+    std::list<vertex_type> front_neighbors;
+    a_iterator_type a_iter, a_end;
+    for( boost::tie( a_iter, a_end ) = adjacent_vertices( v, g );
+         a_iter != a_end; ++a_iter ) {
+      front_neighbors.push_back( *a_iter );
+    }
+    
+    front_neighbors.sort();
+    front_neighbors.unique();
+    dist[out_degree( v, g ) - front_neighbors.size()] += 1;
+  }
+  return dist;
+}
+
+template<typename Graph>
+std::map<unsigned long, unsigned long> degree_dist( Graph& g ) {
+  std::map<unsigned long, unsigned long> dist;
+  typedef typename graph_traits<Graph>::adjacency_iterator a_iterator_type;
+  typedef typename graph_traits<Graph>::vertex_descriptor vertex_type;
+  
+  BGL_FORALL_VERTICES_T( v, g, Graph ) {
+    dist[out_degree( v, g )] += 1;
+  }
+
+  return dist;
+}
+
+template<typename Graph>
+std::map<unsigned long, double> weight_degree_dist( Graph& g ) {
+  std::map<unsigned long, double> dist, n;
+  typedef typename graph_traits<Graph>::adjacency_iterator a_iterator_type;
+  typedef typename graph_traits<Graph>::vertex_descriptor vertex_type;
+  typedef typename property_map<Graph, edge_weight_t>::const_type edge_map_type;
+  typedef typename property_traits<edge_map_type>::value_type 
+    edge_weight_type;
+
+  typename property_map<Graph, edge_weight_t>::type  em = get( edge_weight, g );
+  
+  BGL_FORALL_VERTICES_T( v, g, Graph ) {
+      edge_weight_type tmp = 0;
+      BGL_FORALL_OUTEDGES_T( v, e, g, Graph ) {
+        tmp += em[e];
+      }
+      n[out_degree( v, g )] += 1.;
+      dist[out_degree( v, g )] += tmp;
+  }
+
+  for( std::map<unsigned long, double>::iterator iter = dist.begin();
+       iter != dist.end(); ++iter ) {
+    BOOST_ASSERT( n[iter->first] != 0 );
+    dist[iter->first] /= n[iter->first];
+  }
+
+  return dist;
+}
+
+}}
+
+#endif