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source: trunk/sources/HeuristicLab.TestFunctions/SchwefelEvaluator.cs @ 100

Last change on this file since 100 was 2, checked in by swagner, 17 years ago

Added HeuristicLab 3.0 sources from former SVN repository at revision 52

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;
25using HeuristicLab.Core;
26using HeuristicLab.Data;
27using HeuristicLab.Operators;
28
29namespace HeuristicLab.TestFunctions {
30  public class SchwefelEvaluator : TestFunctionEvaluatorBase {
31    public override string Description {
32      get { return
33@"Schwefel Function (Sine Root)
34
35Domain:  [-500.0 , 500.0]^n
36Optimum: 0.0 at (420.968746453712, 420.968746453712, ..., 420.968746453712)";
37          }
38    }
39
40    protected override double EvaluateFunction(double[] point) {
41      double result = 418.982887272433 * point.Length;
42      for (int i = 0; i < point.Length; i++)
43        result -= point[i] * Math.Sin(Math.Sqrt(Math.Abs(point[i])));
44      return (result);
45    }
46  }
47}
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