1  #region License Information


2  /* HeuristicLab


3  * Copyright (C) 20022013 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 HeuristicLab.Common;


23  using HeuristicLab.Core;


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


25 


26  namespace HeuristicLab.Algorithms.CMAEvolutionStrategy {


27  [Item("CMA Linearweighted Recombinator", "Calculates weighted mean using linear decreasing weights.")]


28  [StorableClass]


29  public class CMALinearweightedRecombinator : CMARecombinator {


30 


31  [StorableConstructor]


32  protected CMALinearweightedRecombinator(bool deserializing) : base(deserializing) { }


33  protected CMALinearweightedRecombinator(CMALinearweightedRecombinator original, Cloner cloner) : base(original, cloner) { }


34  public CMALinearweightedRecombinator() : base() { }


35 


36  public override IDeepCloneable Clone(Cloner cloner) {


37  return new CMALinearweightedRecombinator(this, cloner);


38  }


39 


40  protected override double[] GetWeights(int mu) {


41  var weights = new double[mu];


42  var sum = (mu + 1) * mu / 2.0; // sum of arithmetic progression mu..1


43  for (int i = 0; i < mu; i++)


44  weights[i] = (mu  i) / sum;


45  return weights;


46  }


47  }


48  } 
