code: package edu.cmu.tetrad.algcomparison.statistic;
  
  import edu.cmu.tetrad.algcomparison.statistic.utils.AdjacencyConfusion;
  import edu.cmu.tetrad.graph.Graph;
  
  /**
   * Prints the number of edges in the true graph.
   *
   * @author jdramsey
   */
  public class NumberOfEdgesTrue implements Statistic {
      static final long serialVersionUID = 23L;
  
      @Override
      public String getAbbreviation() {
          return "EdgesT";
      }
  
      @Override
      public String getDescription() {
          return "Number of Edges in the True Graph";
      }
  
      @Override
      public double getValue(Graph trueGraph, Graph estGraph) {
          return trueGraph.getNumEdges();
      }
  
      @Override
      public double getNormValue(double value) {
          return Math.tanh(value);
      }
  }
  