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source: branches/ParameterConfigurationEncoding/HeuristicLab.Encodings.ParameterConfigurationEncoding/3.3/Operators/Crossovers/IntValue/NormalIntValueCrossover.cs @ 8574

Last change on this file since 8574 was 8574, checked in by jkarder, 12 years ago

#1853:

  • extracted experiment generation from encoding
  • added creators
  • added crossovers
  • added manipulators
  • added support for parameters of type IFixedValueParameter
  • minor code improvements
File size: 2.7 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 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
22using System;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Data;
26using HeuristicLab.Operators;
27using HeuristicLab.Optimization;
28using HeuristicLab.Parameters;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30using HeuristicLab.Random;
31
32namespace HeuristicLab.Encodings.ParameterConfigurationEncoding {
33  /// <summary>
34  /// An operator which crosses two integer values. TODO
35  /// </summary>
36  [Item("NormalIntValueCrossover", "An operator which crosses two integer values. TODO")]
37  [StorableClass]
38  public class NormalIntValueCrossover : SingleSuccessorOperator, IIntValueCrossover, IStochasticOperator {
39    public ILookupParameter<IRandom> RandomParameter {
40      get { return (LookupParameter<IRandom>)Parameters["Random"]; }
41    }
42
43    #region Constructors and Cloning
44    public NormalIntValueCrossover() : base() { }
45
46    [StorableConstructor]
47    protected NormalIntValueCrossover(bool deserializing) : base(deserializing) { }
48    protected NormalIntValueCrossover(NormalIntValueCrossover original, Cloner cloner) : base(original, cloner) { }
49    public override IDeepCloneable Clone(Cloner cloner) {
50      return new NormalIntValueCrossover(this, cloner);
51    }
52    #endregion
53
54    public void Apply(IRandom random, IntValue value, IntValue other, IntValueRange range) {
55      value.Value = ApplyStatic(random, value, other, range).Value;
56    }
57
58    public static IntValue ApplyStatic(IRandom random, IntValue better, IntValue worse, IntValueRange range) {
59      NormalDistributedRandom N = new NormalDistributedRandom(random, better.Value, Math.Abs(better.Value - worse.Value) / 3);
60      var offspring = new IntValue();
61      do {
62        offspring.Value = (int)N.NextDouble();
63        offspring.Value = range.ApplyStepSize(offspring.Value);
64      } while (!range.IsInRange(offspring.Value));
65      return offspring;
66    }
67  }
68}
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