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source: branches/3.1/sources/HeuristicLab.TestFunctions/ZakharovEvaluator.cs @ 7887

Last change on this file since 7887 was 291, checked in by swagner, 16 years ago

Worked on ticket #135

  • added additional test functions implemented by adoppelb
File size: 1.6 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 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 System.Collections.Generic;
24using System.Text;
25
26namespace HeuristicLab.TestFunctions {
27  public class ZakharovEvaluator : TestFunctionEvaluatorBase {
28    public override string Description {
29      get { return
30@"Zakharov Function
31
32Domain:  [-5.0 , 10.0]^n
33Optimum: 0.0 at (0.0, 0.0, ..., 0.0)";
34          }
35    }
36
37    public static double Apply(double[] point) {
38      int length = point.Length;
39      double s1 = 0;
40      double s2 = 0;
41
42      for (int i = 0; i < length; i++) {
43        s1 = s1 + point[i] * point[i];
44        s2 = s2 + 0.5 * i * point[i];
45      }
46      return s1 + s2 * s2 + s2 * s2 * s2 * s2;
47    }
48
49    protected override double EvaluateFunction(double[] point) {
50      return Apply(point);
51    }
52  }
53}
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