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source: branches/HeuristicLab.Problems.MultiObjectiveTestFunctions/HeuristicLab.Problems.MultiObjectiveTestFunctions/3.3/Testfunctions/ZDT3.cs @ 13448

Last change on this file since 13448 was 13448, checked in by bwerth, 8 years ago

#1087 implemented more Testfunctions; enabled setting of SolutionSize

File size: 2.0 KB
Line 
1using System;
2using System.Collections.Generic;
3using System.Linq;
4using System.Text;
5using System.Threading.Tasks;
6using HeuristicLab.Common;
7using HeuristicLab.Core;
8using HeuristicLab.Data;
9using HeuristicLab.Encodings.RealVectorEncoding;
10using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
11using HeuristicLab.Problems.MultiObjectiveTestFunction;
12
13namespace HeuristicLab.Problems.TestFunctions {
14  [Item("ZDT3", "//http://www.tik.ee.ethz.ch/sop/download/supplementary/testproblems/ [30.11.2015]")]
15  [StorableClass]
16  public class ZDT3 : MultiObjectiveTestFunction {
17
18    public override DoubleMatrix Bounds {
19      get {
20        return new DoubleMatrix(new double[,] { { 0, 1 } });
21      }
22    }
23
24    public override bool[] Maximization {
25      get {
26        return new bool[] { false, false };
27      }
28    }
29
30    public override int MaximumProblemSize {
31      get {
32        return int.MaxValue;
33      }
34    }
35
36    public override int MaximumSolutionSize {
37      get {
38        return 2;
39      }
40    }
41
42    public override int MinimumProblemSize {
43      get {
44        return 1;
45      }
46    }
47
48    public override int MinimumSolutionSize {
49      get {
50        return 2;
51      }
52    }
53
54    public override int ActualSolutionSize {
55      get {
56        return 2;
57      }
58
59      set {
60      }
61    }
62
63    [StorableConstructor]
64    protected ZDT3(bool deserializing) : base(deserializing) { }
65    protected ZDT3(ZDT3 original, Cloner cloner) : base(original, cloner) { }
66    public ZDT3() : base() { }
67
68    public override IDeepCloneable Clone(Cloner cloner) {
69      return new ZDT3(this, cloner);
70    }
71
72
73
74    public override double[] Evaluate(RealVector r) {
75      double g = 0;
76      for (int i = 1; i < r.Length; i++) g += r[i];
77      g = 1.0 + 9.0 * g / (r.Length - 1);
78      double d = r[0] / g;
79      return new double[] { r[0], g * (1.0 - Math.Sqrt(d) - d * Math.Sin(10 * Math.PI * r[0])) };
80    }
81  }
82}
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