1  #region License Information


2  /* HeuristicLab


3  * Copyright (C) 20022012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)


4  *


5  * This file is part of HeuristicLab.


6  *


7  * HeuristicLab is free software: you can redistribute it and/or modify


8  * it under the terms of the GNU General Public License as published by


9  * the Free Software Foundation, either version 3 of the License, or


10  * (at your option) any later version.


11  *


12  * HeuristicLab is distributed in the hope that it will be useful,


13  * but WITHOUT ANY WARRANTY; without even the implied warranty of


14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the


15  * GNU General Public License for more details.


16  *


17  * You should have received a copy of the GNU General Public License


18  * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.


19  */


20  #endregion


21 


22  using System;


23  using HeuristicLab.Common;


24  using HeuristicLab.Core;


25  using HeuristicLab.Data;


26  using HeuristicLab.Encodings.RealVectorEncoding;


27  using HeuristicLab.Optimization.Operators;


28  using HeuristicLab.Parameters;


29  using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;


30 


31  namespace HeuristicLab.Problems.TestFunctions {


32  /// <summary>


33  /// An operator that performs similarity calculation between two test functions solutions.


34  /// </summary>


35  [Item("SingleObjectiveTestFunctionSimilarityCalculator", "An operator that performs similarity calculation between two test functions solutions.")]


36  [StorableClass]


37  public sealed class SingleObjectiveTestFunctionSimilarityCalculator : SimilarityCalculator {


38  #region Parameter properties


39  public ILookupParameter<DoubleMatrix> BoundsParameter {


40  get { return (ILookupParameter<DoubleMatrix>)Parameters["Bounds"]; }


41  }


42  #endregion


43 


44  #region Properties


45  private DoubleMatrix Bounds {


46  get { return BoundsParameter.ActualValue; }


47  set { BoundsParameter.ActualValue = value; }


48  }


49  #endregion


50 


51  [StorableConstructor]


52  private SingleObjectiveTestFunctionSimilarityCalculator(bool deserializing) : base(deserializing) { }


53  private SingleObjectiveTestFunctionSimilarityCalculator(SingleObjectiveTestFunctionSimilarityCalculator original, Cloner cloner) : base(original, cloner) { }


54  public SingleObjectiveTestFunctionSimilarityCalculator()


55  : base() {


56  #region Create parameters


57  Parameters.Add(new LookupParameter<DoubleMatrix>("Bounds"));


58  #endregion


59  }


60 


61  public override IDeepCloneable Clone(Cloner cloner) {


62  return new SingleObjectiveTestFunctionSimilarityCalculator(this, cloner);


63  }


64 


65  protected override double CalculateSimilarity(IScope left, IScope right) {


66  RealVector sol1 = left.Variables["Point"].Value as RealVector;


67  RealVector sol2 = right.Variables["Point"].Value as RealVector;


68 


69  double maxSum = 0.0;


70  for (int i = 0; i < sol1.Length; i++)


71  maxSum += Math.Pow(Bounds[0, 0]  Bounds[0, 1], 2);


72  double maxDistance = Math.Sqrt(maxSum) / sol1.Length;


73 


74  double sum = 0.0;


75  for (int i = 0; i < sol1.Length; i++)


76  sum += Math.Pow(sol1[i]  sol2[i], 2);


77  double distance = Math.Sqrt(sum) / sol1.Length;


78 


79  return 1.0  distance / maxDistance;


80  }


81  }


82  }

