Package es.uam.eps.ir.relison.sna.metrics.vertex

Class FreeDiscovery<U>

java.lang.Object
es.uam.eps.ir.relison.sna.metrics.vertex.FreeDiscovery<U>
Type Parameters:
U - Type of the users.
All Implemented Interfaces:
VertexMetric<U>
public class FreeDiscovery<U>
extends java.lang.Object
implements VertexMetric<U>
Finds how unpopular the user is in the network.

Reference: P. Castells, S. Vargas, N. Hurley. Novelty and diversity in recommender systems. Recommender Systems Handbook, 2nd. ed., pp. 881-918 (2015)

  • Field Summary

    Fields 
    Modifier and Type Field Description
    private EdgeOrientation orient
    Orientation.

  • Constructor Summary

    Constructors 
    Constructor Description
    FreeDiscovery​(EdgeOrientation orient)
    Constructor.

  • Method Summary

    Modifier and Type Method Description
    java.util.Map<U,​java.lang.Double> compute​(Graph<U> graph)
    Computes the value of the metric for all the users in the graph.
    java.util.Map<U,​java.lang.Double> compute​(Graph<U> graph, java.util.stream.Stream<U> users)
    Computes the value of the metric for a subset of the users in the graph.
    double compute​(Graph<U> graph, U user)
    Computes the value of the metric for a single user.

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface es.uam.eps.ir.relison.sna.metrics.VertexMetric

    averageValue, averageValue

  • Field Details

  • Constructor Details

  • Method Details

    • compute

      public java.util.Map<U,​java.lang.Double> compute​(Graph<U> graph)
      Description copied from interface: VertexMetric
      Computes the value of the metric for all the users in the graph.
      Specified by:
      compute in interface VertexMetric<U>
      Parameters:
      graph - The graph.
      Returns:
      A map relating the users with the values of the metric.

    • compute

      public java.util.Map<U,​java.lang.Double> compute​(Graph<U> graph, java.util.stream.Stream<U> users)
      Description copied from interface: VertexMetric
      Computes the value of the metric for a subset of the users in the graph.
      Specified by:
      compute in interface VertexMetric<U>
      Parameters:
      graph - the graph.
      users - the stream of users.
      Returns:
      a map relating users with the values of the metric. Nodes not in the graph will not be included in the map.

    • compute

      public double compute​(Graph<U> graph, U user)
      Description copied from interface: VertexMetric
      Computes the value of the metric for a single user.
      Specified by:
      compute in interface VertexMetric<U>
      Parameters:
      graph - The graph.
      user - The user to compute.
      Returns:
      the value of the metric.