Package es.uam.eps.ir.relison.sna.metrics.communities.graph

Class Modularity<U>

java.lang.Object
es.uam.eps.ir.relison.sna.metrics.communities.graph.Modularity<U>
Type Parameters:
U - The type of the users.
All Implemented Interfaces:
CommunityMetric<U>
public class Modularity<U>
extends java.lang.Object
implements CommunityMetric<U>
Computes the modularity of a graph, given the communities.

Reference: M.E.J. Newman, M. Girvan. Finding and evaluating community structure in networks. Physical Review E 69(2), pp. 1-16 (2004)

  • Constructor Summary

    Constructors 
    Constructor Description
    Modularity()  

  • Method Summary

    Modifier and Type Method Description
    double compute​(Graph<U> graph, Communities<U> comm)
    Computes the value of the metric in the graph.
    private double computeDirected​(DirectedGraph<U> graph, Communities<U> comm, MultiGraph<java.lang.Integer> commGraph)
    Computes the value of the modularity for a directed graph
    private double computeUndirected​(UndirectedGraph<U> graph, Communities<U> comm, MultiGraph<java.lang.Integer> commGraph)
    Computes the value of the modularity for an undirected graph.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

  • Method Details

    • compute

      public double compute​(Graph<U> graph, Communities<U> comm)
      Description copied from interface: CommunityMetric
      Computes the value of the metric in the graph.
      Specified by:
      compute in interface CommunityMetric<U>
      Parameters:
      graph - Graph.
      comm - Communities of the graph.
      Returns:
      the value of the metric.

    • computeDirected

      private double computeDirected​(DirectedGraph<U> graph, Communities<U> comm, MultiGraph<java.lang.Integer> commGraph)
      Computes the value of the modularity for a directed graph
      Parameters:
      graph - The directed graph
      comm - The communities
      commGraph - The community graph
      Returns:
      The value of the modularity

    • computeUndirected

      private double computeUndirected​(UndirectedGraph<U> graph, Communities<U> comm, MultiGraph<java.lang.Integer> commGraph)
      Computes the value of the modularity for an undirected graph.
      Parameters:
      graph - The undirected graph.
      comm - The communities.
      commGraph - The community graph.
      Returns:
      The value of the modularity of the graph.