source: branches/ProblemRefactoring/HeuristicLab.Encodings.BinaryVectorEncoding/3.3/Manipulators/MultiBitflipManipulator.cs @ 14429

Last change on this file since 14429 was 14429, checked in by abeham, 4 years ago

#2701, #2708: Made a new branch from ProblemRefactoring and removed ScopedBasicAlgorithm branch (which becomes MemPR branch)

File size: 2.6 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 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 HeuristicLab.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.Optimization;
26using HeuristicLab.Parameters;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.Encodings.BinaryVectorEncoding {
30  [Item("Multi Bitflip Manipulator", "", ExcludeGenericTypeInfo = true)]
31  [StorableClass]
32  public sealed class MultiBitflipManipulator<TContext> : BitflipManipulator<TContext>
33      where TContext : ISingleObjectiveSolutionContext<BinaryVector>, IStochasticContext {
34
35    private IValueParameter<PercentValue> RatePerBitParameter {
36      get { return (IValueParameter<PercentValue>)Parameters["RatePerBit"]; }
37    }
38
39    public double RatePerBit {
40      get { return RatePerBitParameter.Value.Value; }
41      set { RatePerBitParameter.Value.Value = value; }
42    }
43
44    [StorableConstructor]
45    private MultiBitflipManipulator(bool deserializing) : base(deserializing) { }
46    private MultiBitflipManipulator(MultiBitflipManipulator<TContext> original, Cloner cloner)
47      : base(original, cloner) { }
48    public MultiBitflipManipulator() {
49      Parameters.Add(new ValueParameter<PercentValue>("RatePerBit", "The probability of mutating each bit (independent of each other).", new PercentValue(0.05)));
50    }
51
52    public override IDeepCloneable Clone(Cloner cloner) {
53      return new MultiBitflipManipulator<TContext>(this, cloner);
54    }
55
56    public override void Manipulate(TContext context) {
57      var len = context.Solution.Solution.Length;
58      var rate = RatePerBit;
59
60      for (var idx = 0; idx < len; idx++)
61        if (context.Random.NextDouble() < rate)
62          context.Solution.Solution[idx] = !context.Solution.Solution[idx];
63    }
64  }
65}
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