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source: branches/Parameter-less Population Pyramid/HeuristicLab.Algorithms.ParameterlessPopulationPyramid/3.3/Problems/DeceptiveStepTrapProblem.cs @ 11672

Last change on this file since 11672 was 11672, checked in by bgoldman, 9 years ago

#2282 Commenting, added some basic unit tests for P3.

File size: 2.7 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2013 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.Collections.Generic;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Data;
26using HeuristicLab.Parameters;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.Algorithms.ParameterlessPopulationPyramid {
30  [Item("Deceptive Step Trap Problem", "Genome encodes completely separable blocks, where each block deceptive with fitness plateaus.")]
31  [StorableClass]
32  [Creatable("Parameterless Population Pyramid")]
33  // In the GECCO paper, Section 4.1
34  public class DeceptiveStepTrapProblem : DeceptiveTrapProblem {
35    [StorableConstructor]
36    protected DeceptiveStepTrapProblem(bool deserializing) : base(deserializing) { }
37    protected DeceptiveStepTrapProblem(DeceptiveStepTrapProblem original, Cloner cloner)
38      : base(original, cloner) {
39    }
40    public override IDeepCloneable Clone(Cloner cloner) {
41      return new DeceptiveStepTrapProblem(this, cloner);
42    }
43
44    private const string StepSizeParameterName = "Step Size";
45
46    public IFixedValueParameter<IntValue> StepSizeParameter {
47      get { return (IFixedValueParameter<IntValue>)Parameters[StepSizeParameterName]; }
48    }
49
50    public int StepSize {
51      get { return StepSizeParameter.Value.Value; }
52      set { StepSizeParameter.Value.Value = value; }
53    }
54
55    public DeceptiveStepTrapProblem()
56      : base() {
57      Parameters.Add(new FixedValueParameter<IntValue>(StepSizeParameterName, "", new IntValue(2)));
58    }
59
60    private int Offset {
61      get { return (TrapSize - StepSize) % StepSize; }
62    }
63
64    protected override int TrapMaximum {
65      get { return (Offset + TrapSize) / StepSize; }
66    }
67
68    protected override int Score(bool[] individual, int trapIndex) {
69      int partial = base.Score(individual, trapIndex);
70      // introduce plateaus using integer division
71      return (Offset + partial) / StepSize;
72    }
73  }
74}
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