Free cookie consent management tool by TermsFeed Policy Generator

source: stable/HeuristicLab.Problems.Instances.DataAnalysis/3.3/Regression/Vladislavleva/UnwrappedBallFunctionFiveDimensional.cs @ 14389

Last change on this file since 14389 was 14305, checked in by gkronber, 8 years ago

#2371: merged r14228, r14229 from trunk to stable

File size: 3.6 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 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.Linq;
25using HeuristicLab.Random;
26
27namespace HeuristicLab.Problems.Instances.DataAnalysis {
28  public class UnwrappedBallFunctionFiveDimensional : ArtificialRegressionDataDescriptor {
29
30    public override string Name { get { return "Vladislavleva-4 F4(X1, X2, X3, X4, X5) = 10 / (5 + Sum(Xi - 3)^2)"; } }
31    public override string Description {
32      get {
33        return "Paper: Order of Nonlinearity as a Complexity Measure for Models Generated by Symbolic Regression via Pareto Genetic Programming " + Environment.NewLine
34        + "Authors: Ekaterina J. Vladislavleva, Member, IEEE, Guido F. Smits, Member, IEEE, and Dick den Hertog" + Environment.NewLine
35        + "Function: F4(X1, X2, X3, X4, X5) = 10 / (5 + Sum(Xi - 3)^2)" + Environment.NewLine
36        + "Training Data: 1024 points Xi = Rand(0.05, 6.05)" + Environment.NewLine
37        + "Test Data: 5000 points Xi = Rand(-0.25, 6.35)" + Environment.NewLine
38        + "Function Set: +, -, *, /, square, x^eps, x + eps, x * eps";
39      }
40    }
41    protected override string TargetVariable { get { return "Y"; } }
42    protected override string[] VariableNames { get { return new string[] { "X1", "X2", "X3", "X4", "X5", "Y" }; } }
43    protected override string[] AllowedInputVariables { get { return new string[] { "X1", "X2", "X3", "X4", "X5" }; } }
44    protected override int TrainingPartitionStart { get { return 0; } }
45    protected override int TrainingPartitionEnd { get { return 1024; } }
46    protected override int TestPartitionStart { get { return 1024; } }
47    protected override int TestPartitionEnd { get { return 6024; } }
48    public int Seed { get; private set; }
49
50    public UnwrappedBallFunctionFiveDimensional() : this((int)DateTime.Now.Ticks) { }
51
52    public UnwrappedBallFunctionFiveDimensional(int seed) : base() {
53      Seed = seed;
54    }
55    protected override List<List<double>> GenerateValues() {
56      List<List<double>> data = new List<List<double>>();
57      var rand = new MersenneTwister((uint)Seed);
58      for (int i = 0; i < AllowedInputVariables.Count(); i++) {
59        data.Add(ValueGenerator.GenerateUniformDistributedValues(rand.Next(), 1024, 0.05, 6.05).ToList());
60        data[i].AddRange(ValueGenerator.GenerateUniformDistributedValues(rand.Next(), 5000, -0.25, 6.35));
61      }
62
63      double x1, x2, x3, x4, x5;
64      List<double> results = new List<double>();
65      for (int i = 0; i < data[0].Count; i++) {
66        x1 = data[0][i];
67        x2 = data[1][i];
68        x3 = data[2][i];
69        x4 = data[3][i];
70        x5 = data[4][i];
71        results.Add(10 / (5 + Math.Pow(x1 - 3, 2) + Math.Pow(x2 - 3, 2) + Math.Pow(x3 - 3, 2) + Math.Pow(x4 - 3, 2) + Math.Pow(x5 - 3, 2)));
72      }
73      data.Add(results);
74
75      return data;
76    }
77  }
78}
Note: See TracBrowser for help on using the repository browser.