lib/rgraph/graph.rb in rgraph-0.0.11 vs lib/rgraph/graph.rb in rgraph-0.0.12

@@ -166,9 +166,19 @@
     distances unless @distance
 
     (distances.flatten - [@infinity]).max
   end
 
+  def farness
+    distances unless @distance
+
+    @distance.map{ |line| line.select{|l| l != @infinity }.inject(:+) }
+  end
+
+  def closeness
+    farness.map{|f| 1.0 / f }
+  end
+
   def single_clustering(node)
     possible = possible_connections(node)
     return 0 if possible == 0
 
     existent = node.neighbours.combination(2).select{ |t| t[0].neighbours.include?(t[1]) }.count