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source: trunk/sources/HeuristicLab.TestFunctions/3.2/BealeEvaluator.cs @ 1530

Last change on this file since 1530 was 1530, checked in by gkronber, 15 years ago

Moved source files of plugins Hive ... Visualization.Test into version-specific sub-folders. #576

File size: 2.3 KB
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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  /// <summary>
28  /// Beale Function<br/>
29  /// Domain:  [-4.5 , 4.5]^2<br/>
30  /// Optimum: 0.0 at (3.0, 0.5)
31  /// </summary>
32  public class BealeEvaluator : TestFunctionEvaluatorBase {
33    /// <inheritdoc select="summary"/>
34    public override string Description {
35      get { return
36@"Beale Function
37
38Domain:  [-4.5 , 4.5]^2
39Optimum: 0.0 at (3.0, 0.5)";
40          }
41    }
42
43    /// <summary>
44    /// Evaluates the test function for a specific <paramref name="point"/>.
45    /// </summary>
46    /// <param name="point">N-dimensional point for which the test function should be evaluated.</param>
47    /// <returns>The result value of the Beale function at the given point.</returns>
48    public static double Apply(double[] point) {
49      return Math.Pow(1.5 - point[0] * (1 - point[1]), 2) + Math.Pow(2.25 - point[0] * (1 - (point[1] * point[1])), 2) + Math.Pow((2.625 - point[0] * (1 - (point[1] * point[1] * point[1]))), 2);
50    }
51
52    /// <summary>
53    /// Evaluates the test function for a specific <paramref name="point"/>.
54    /// </summary>
55    /// <remarks>Calls <see cref="Apply"/>.</remarks>
56    /// <param name="point">N-dimensional point for which the test function should be evaluated.</param>
57    /// <returns>The result value of the Beale function at the given point.</returns>
58    protected override double EvaluateFunction(double[] point) {
59      return Apply(point);
60    }
61  }
62}
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