source: trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/MctsSymbolicRegression/Tree.cs @ 13657

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 * 
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

namespace HeuristicLab.Algorithms.DataAnalysis.MctsSymbolicRegression {
  // represents tree nodes for the search tree in MCTS
  internal class Tree {
    public int state;
    public int visits;
    public double sumQuality;
    public double sumSqrQuality; // for variance
    public double AverageQuality { get { return sumQuality / (double)visits; } }
    public double QualityVariance { get { return sumSqrQuality / (double)visits - AverageQuality * AverageQuality; } }
    public bool done;
    public Tree[] children;
  }
}