1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Generic;
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24 | using HeuristicLab.Data;
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25 |
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26 | namespace HeuristicLab.Problems.DataAnalysis.Benchmarks {
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27 | public class SalutowiczFunctionTwoDimensional : RegressionToyBenchmark {
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28 |
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29 | public SalutowiczFunctionTwoDimensional() {
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30 | Name = "Salutowicz2D";
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31 | Description = "Paper: Order of Nonlinearity as a Complexity Measure for Models Generated by Symbolic Regression via Pareto Genetic Programming " + Environment.NewLine
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32 | + "Authors: Ekaterina J. Vladislavleva, Member, IEEE, Guido F. Smits, Member, IEEE, and Dick den Hertog" + Environment.NewLine
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33 | + "Function: F3(X1, X2) = e^-X1 * X1^3 * cos(X1) * sin(X1) * (cos(X1)sin(X1)^2 - 1)(X2 - 5)" + Environment.NewLine
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34 | + "Training Data: 601 points X1 = (0.05:0.1:10), X2 = (0.05:2:10.05)" + Environment.NewLine
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35 | + "Test Data: 2554 points X1 = (-0.5:0.05:10.5), X2 = (-0.5:0.5:10.5)" + Environment.NewLine
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36 | + "Function Set: +, -, *, /, sqaure, x^real, x + real, x + real, e^x, e^-x, sin(x), cos(x)" + Environment.NewLine + Environment.NewLine
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37 | + "Important: The stepwidth of the variable X1 in the test partition has been set to 0.1, to fit the amount of data points.";
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38 | targetVariable = "Y";
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39 | inputVariables = new List<string>() { "X1", "X2" };
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40 | trainingPartition = new IntRange(0, 601);
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41 | testPartition = new IntRange(602, 3155);
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42 | }
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43 |
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44 | protected override List<double> GenerateTarget(List<List<double>> data) {
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45 | double x1, x2;
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46 | List<double> results = new List<double>();
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47 | for (int i = 0; i < data[0].Count; i++) {
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48 | x1 = data[0][i];
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49 | x2 = data[1][i];
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50 | results.Add(Math.Exp(-x1) * Math.Pow(x1, 3) * Math.Cos(x1) * Math.Sin(x1) * (Math.Cos(x1) * Math.Pow(Math.Sin(x1), 2) - 1) * (x2 - 5));
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51 | }
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52 | return results;
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53 | }
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54 |
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55 | protected override List<List<double>> GenerateInput() {
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56 | List<List<double>> dataList = new List<List<double>>();
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57 | List<List<double>> trainingData = new List<List<double>>() {
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58 | RegressionBenchmark.GenerateSteps(new DoubleRange(0.05, 10), 0.1),
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59 | RegressionBenchmark.GenerateSteps(new DoubleRange(0.05, 10.05), 2)
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60 | };
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61 |
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62 | List<List<double>> testData = new List<List<double>>() {
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63 | RegressionBenchmark.GenerateSteps(new DoubleRange(-0.5, 10.5), 0.1),
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64 | RegressionBenchmark.GenerateSteps(new DoubleRange(-0.5, 10.5), 0.5)
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65 | };
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66 |
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67 | trainingData = RegressionBenchmark.AllCombinationsOf(trainingData);
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68 | testData = RegressionBenchmark.AllCombinationsOf(testData);
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69 |
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70 | for (int i = 0; i < InputVariable.Count; i++) {
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71 | dataList.Add(trainingData[i]);
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72 | dataList[i].AddRange(testData[i]);
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73 | }
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74 |
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75 | return dataList;
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76 | }
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77 | }
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78 | }
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