1 | using System;
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2 | using System.Collections.Generic;
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3 | using HeuristicLab.Problems.DataAnalysis;
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4 | using HeuristicLab.Problems.DataAnalysis.Symbolic;
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5 | using Microsoft.VisualStudio.TestTools.UnitTesting;
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6 |
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7 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic.Tests {
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8 | [TestClass]
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9 | public class IntervalInterpreterTest {
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10 | private IRegressionProblemData problemData;
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11 | private Dictionary<string, Interval> variableRanges;
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12 |
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13 | [TestInitialize]
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14 | public void InitTest() {
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15 | double[,] arr = new double[4, 3];
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16 |
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17 | arr[0, 0] = 3;
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18 | arr[0, 1] = 6;
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19 | arr[0, 2] = 2;
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20 | arr[1, 0] = 5;
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21 | arr[1, 1] = 2;
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22 | arr[1, 2] = 1;
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23 | arr[2, 0] = 8;
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24 | arr[2, 1] = 5;
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25 | arr[2, 2] = 0;
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26 | arr[3, 0] = 3;
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27 | arr[3, 1] = 4;
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28 | arr[3, 2] = 2;
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29 |
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30 | var ds = new Dataset(new string[] { "x1", "x2", "y" }, arr);
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31 | problemData = (IRegressionProblemData)new RegressionProblemData(ds, new string[] { "x1", "x2" }, "y");
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32 |
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33 | variableRanges = new Dictionary<string, Interval>();
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34 | variableRanges.Add("x1", new Interval(1, 10));
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35 | variableRanges.Add("x2", new Interval(4, 6));
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36 | }
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37 |
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38 | private void EvaluateTest(string expression, Interval expectedResult, Dictionary<string, Interval> variableRanges = null) {
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39 | var parser = new InfixExpressionParser();
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40 | var tree = parser.Parse(expression);
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41 | var interpreter = new IntervalInterpreter();
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42 | Interval result;
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43 | if (variableRanges == null)
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44 | result = interpreter.GetSymbolicExressionTreeInterval(tree, problemData.Dataset, problemData.AllIndices);
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45 | else
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46 | result = interpreter.GetSymbolicExressionTreeInterval(tree, variableRanges);
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47 |
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48 | Assert.AreEqual(expectedResult, result);
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49 | }
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50 |
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51 |
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52 | [TestMethod]
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53 | [TestCategory("Problems.DataAnalysis.Symbolic")]
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54 | [TestProperty("Time", "short")]
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55 | public void TestIntervalInterpreterAdd() {
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56 | EvaluateTest("x1 + x2", new Interval(5, 14));
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57 | EvaluateTest("x1 + x2", new Interval(5, 16), variableRanges);
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58 | }
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59 |
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60 | [TestMethod]
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61 | [TestCategory("Problems.DataAnalysis.Symbolic")]
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62 | [TestProperty("Time", "short")]
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63 | public void TestIntervalInterpreterLogAdd() {
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64 | EvaluateTest("log(x1 + x2)", new Interval(Math.Log(5), Math.Log(14)));
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65 | EvaluateTest("log(x1 + x2)", new Interval(Math.Log(5), Math.Log(16)), variableRanges);
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66 | }
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67 |
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68 | [TestMethod]
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69 | [TestCategory("Problems.DataAnalysis.Symbolic")]
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70 | [TestProperty("Time", "short")]
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71 | public void TestIntervalInterpreterLogAddMul() {
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72 | EvaluateTest("log(3*x1 + x2)", new Interval(Math.Log(11), Math.Log(30)));
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73 | EvaluateTest("log(3*x1 + x2)", new Interval(Math.Log(7), Math.Log(36)), variableRanges);
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74 | }
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75 |
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76 | [TestMethod]
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77 | [TestCategory("Problems.DataAnalysis.Symbolic")]
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78 | [TestProperty("Time", "short")]
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79 | public void TestIntervalInterpreterSin() {
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80 | EvaluateTest("sin(x1+x2)", new Interval(-1, 1));
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81 | EvaluateTest("sin(x1+x2)", new Interval(-1, 1), variableRanges);
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82 | EvaluateTest("sin(1+2)", new Interval(Math.Sin(3), Math.Sin(3)));
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83 | }
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84 |
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85 | [TestMethod]
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86 | [TestCategory("Problems.DataAnalysis.Symbolic")]
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87 | [TestProperty("Time", "short")]
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88 | public void TestIntervalInterpreterCos() {
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89 | EvaluateTest("cos(x1+x2)", new Interval(-1, 1));
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90 | EvaluateTest("cos(x1+x2)", new Interval(-1, 1), variableRanges);
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91 | EvaluateTest("cos(1+2)", new Interval(Math.Sin(3 - Math.PI / 2), Math.Sin(3 - Math.PI / 2)));
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92 | }
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93 |
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94 | [TestMethod]
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95 | [TestCategory("Problems.DataAnalysis.Symbolic")]
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96 | [TestProperty("Time", "short")]
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97 | public void TestIntervalInterpreterExp() {
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98 | EvaluateTest("exp(x1-x2)", new Interval(Math.Exp(-3), Math.Exp(6)));
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99 | EvaluateTest("exp(x1-x2)", new Interval(Math.Exp(-5), Math.Exp(6)), variableRanges);
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100 | }
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101 |
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102 | [TestMethod]
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103 | [TestCategory("Problems.DataAnalysis.Symbolic")]
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104 | [TestProperty("Time", "short")]
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105 | public void TestIntervalInterpreterExpRoot() {
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106 | EvaluateTest("exp(root(x1*x2, 2))", new Interval(Math.Exp(Math.Sqrt(6)), Math.Exp(Math.Sqrt(48))));
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107 | EvaluateTest("exp(root(x1*x2, 2))", new Interval(Math.Exp(Math.Sqrt(4)), Math.Exp(Math.Sqrt(60))), variableRanges);
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108 | }
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109 |
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110 | [TestMethod]
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111 | [TestCategory("Problems.DataAnalysis.Symbolic")]
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112 | [TestProperty("Time", "short")]
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113 | public void TestIntervalInterpreterPower() {
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114 | EvaluateTest("pow(x1, 2)", new Interval(Math.Pow(3, 1), Math.Pow(8, 3)));
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115 | }
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116 | }
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117 | }
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