1 | using System;
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2 |
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3 | namespace HeuristicLab.Problems.ProgramSynthesis.Push.Problem {
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4 | using System.Collections.Generic;
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5 | using System.Linq;
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6 | using BenchmarkSuite.Problems;
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7 | using Common;
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8 | using Configuration;
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9 | using Core;
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10 | using Encodings.IntegerVectorEncoding;
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11 | using Expressions;
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12 | using HeuristicLab.Data;
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13 | using Instances;
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14 | using Interpreter;
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15 | using Optimization;
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16 | using Parameters;
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17 | using Persistence.Default.CompositeSerializers.Storable;
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18 | using Stack;
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19 |
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20 | [StorableClass]
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21 | [Creatable(CreatableAttribute.Categories.GeneticProgrammingProblems, Priority = 180)]
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22 | [Item("Push Problem", "")]
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23 | public class PushProblem : SingleObjectiveBasicProblem<IntegerVectorEncoding>, IProblemInstanceConsumer<Data> {
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24 | [Storable]
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25 | private readonly PushConfiguration config;
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26 | private PushInterpreterPool pool;
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27 |
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28 | public PushProblem() {
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29 | config = new PushConfiguration();
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30 | pool = new PushInterpreterPool(config);
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31 |
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32 | InitEvents();
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33 | InitParameters();
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34 | Instructions = config;
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35 | }
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36 |
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37 | [StorableConstructor]
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38 | public PushProblem(bool deserializing)
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39 | : base(deserializing) {
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40 | }
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41 |
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42 | public PushProblem(PushProblem original, Cloner cloner)
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43 | : base(original, cloner) {
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44 | config = cloner.Clone(original.config);
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45 | pool = new PushInterpreterPool(config);
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46 |
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47 | Instructions = config;
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48 |
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49 | this.InitEvents();
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50 | }
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51 |
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52 |
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53 | [StorableHook(HookType.AfterDeserialization)]
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54 | // ReSharper disable once UnusedMember.Local
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55 | private void AfterDeserialization() {
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56 | pool = new PushInterpreterPool(config);
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57 | Instructions = config;
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58 |
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59 | InitEvents();
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60 | }
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61 |
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62 | private void InitEvents() {
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63 | config.EnabledExpressionsChanged += EnabledExpressionsChanged;
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64 | }
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65 |
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66 | private void EnabledExpressionsChanged(object sender, EnabledExpressionsChangedEventArgs e) {
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67 | this.Encoding.Bounds[0, 1] = config.EnabledExpressions.Count - 1;
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68 | this.Encoding.BoundsParameter.Value[0, 1] = config.EnabledExpressions.Count - 1;
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69 | }
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70 |
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71 | #region Parameters
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72 |
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73 | private const string EvalPushLimitParameterName = "EvalPushLimit";
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74 | private const string EvalPushLimitParameterDescription = "This is the maximum allowed number of \"executions\" in a single top-level call to the interpreter. The execution of a single Push instruction counts as one execution, as does the processing of a single literal, as does the descent into one layer of parentheses (that is, the processing of the \"(\" counts as one execution).";
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75 | private const string MaxProgramLengthParameterName = "MaxProgramLength";
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76 | private const string MaxProgramLengthParameterDescription = "This is the maximum size of an item on the CODE stack, expressed as a number of points. A point is an instruction, a literal, or a pair of parentheses.";
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77 | private const string TopLevelPushCodeParameterName = "TopLevelPushCode";
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78 | private const string TopLevelPushCodeParameterDescription = "When TRUE (which is the default), code passed to the top level of the interpreter will be pushed onto the CODE stack prior to execution.";
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79 | private const string TopLevelPopCodeParameterName = "TopLevelPopCode";
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80 | private const string TopLevelPopCodeParameterDescription = "When TRUE, the CODE stack will be popped at the end of top level calls to the interpreter. The default is FALSE.";
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81 | private const string InstructionsParameterName = "Instructions";
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82 | private const string InstructionsParameterDescription = "Enables/Disables Instructions";
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83 | private const string DataParameterName = "Data";
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84 | private const string DataParameterDescription = "Program Synthesis";
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85 | private const string MinRandomIntegerParameterName = "MinRandomInteger";
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86 | private const string MinRandomIntegerParameterDescription = "The minimum INTEGER that will be produced as an ephemeral random INTEGER constant or from a call to INTEGER.RAND.";
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87 | private const string MaxRandomIntegerParameterName = "MaxRandomInteger";
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88 | private const string MaxRandomIntegerParameterDescription = "The maximum INTEGER that will be produced as an ephemeral random INTEGER constant or from a call to INTEGER.RAND.";
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89 | private const string MinRandomFloatParameterName = "MinRandomFloat";
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90 | private const string MinRandomFloatParameterDescription = "The minimum FLOAT that will be produced as an ephemeral random FLOAT constant or from a call to FLOAT.RAND.";
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91 | private const string MaxRandomFloatParameterName = "MaxRandomFloat";
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92 | private const string MaxRandomFloatParameterDescription = "The maximum FLOAT that will be produced as an ephemeral random FLOAT constant or from a call to FLOAT.RAND.";
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93 | private const string NewErcNameProbabilityParameterName = "NewErcNameProbability";
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94 | private const string NewErcNameProbabilityParameterDescription = "The probability that the selection of the ephemeral random NAME constant for inclusion in randomly generated code will produce a new name.";
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95 | private const string ErcProbabilityParameterName = "ErcProbability";
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96 | private const string ErcProbabilityParameterDescription = "The probability that the selection of a epheral random literal constant for inclusion in randomly generated code will produce a new literal.";
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97 | private const string MaxPointsInRandomInstructionParameterName = "MaxPointsInRandomInstruction";
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98 | private const string MaxPointsInRandomInstructionParameterDescription = "MaxPointsInRandomInstruction";
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99 | private const string DataBoundsParameterName = "DataBounds";
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100 |
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101 | private void InitParameters() {
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102 | var bounds = new IntMatrix(1, 3, new[] { "Training Start", "Training End | Test Start", "Test End" });
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103 | bounds.ItemChanged += (s, e) => {
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104 | if (Data == null)
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105 | return;
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106 |
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107 | var max = Data.OriginalTestCount + Data.OriginalTrainingCount - 1;
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108 | bounds[0, 0] = Math.Min(Math.Max(bounds[0, 0], 0), max);
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109 | bounds[0, 2] = Math.Max(Math.Min(bounds[0, 2], max), 0);
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110 | bounds[0, 1] = Math.Min(Math.Max(bounds[0, 0], bounds[0, 1]), bounds[0, 2]);
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111 | };
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112 |
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113 | Parameters.Add(new FixedValueParameter<IntMatrix>(
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114 | DataBoundsParameterName,
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115 | bounds));
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116 |
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117 | Parameters.Add(new FixedValueParameter<IntValue>(
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118 | EvalPushLimitParameterName,
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119 | EvalPushLimitParameterDescription,
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120 | new IntValue(config.EvalPushLimit)));
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121 |
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122 | Parameters.Add(new FixedValueParameter<IntValue>(
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123 | MaxProgramLengthParameterName,
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124 | MaxProgramLengthParameterDescription,
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125 | new IntValue(config.MaxPointsInProgram)));
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126 |
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127 | Parameters.Add(new FixedValueParameter<BoolValue>(
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128 | TopLevelPushCodeParameterName,
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129 | TopLevelPushCodeParameterDescription,
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130 | new BoolValue(config.TopLevelPushCode)) { Hidden = true });
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131 |
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132 | Parameters.Add(new FixedValueParameter<BoolValue>(
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133 | TopLevelPopCodeParameterName,
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134 | TopLevelPopCodeParameterDescription,
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135 | new BoolValue(config.TopLevelPopCode)) { Hidden = true });
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136 |
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137 | Parameters.Add(new ValueParameter<IEnabledExpressionsConfiguration>(
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138 | InstructionsParameterName,
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139 | InstructionsParameterDescription));
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140 |
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141 | Parameters.Add(new FixedValueParameter<IntValue>(
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142 | MinRandomIntegerParameterName,
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143 | MinRandomIntegerParameterDescription,
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144 | new IntValue(config.MinRandomInteger)) { Hidden = true });
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145 |
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146 | Parameters.Add(new FixedValueParameter<IntValue>(
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147 | MaxRandomIntegerParameterName,
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148 | MaxRandomIntegerParameterDescription,
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149 | new IntValue(config.MaxRandomInteger)) { Hidden = true });
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150 |
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151 | Parameters.Add(new FixedValueParameter<DoubleValue>(
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152 | MinRandomFloatParameterName,
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153 | MinRandomFloatParameterDescription,
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154 | new DoubleValue(config.MinRandomFloat)) { Hidden = true });
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155 |
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156 | Parameters.Add(new FixedValueParameter<DoubleValue>(
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157 | MaxRandomFloatParameterName,
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158 | MaxRandomFloatParameterDescription,
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159 | new DoubleValue(config.MaxRandomFloat)) { Hidden = true });
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160 |
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161 | Parameters.Add(new FixedValueParameter<PercentValue>(
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162 | NewErcNameProbabilityParameterName,
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163 | NewErcNameProbabilityParameterDescription,
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164 | new PercentValue(config.NewErcNameProbability)) { Hidden = true });
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165 |
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166 | Parameters.Add(new FixedValueParameter<PercentValue>(
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167 | ErcProbabilityParameterName,
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168 | ErcProbabilityParameterDescription,
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169 | new PercentValue(config.ErcProbability)) { Hidden = true });
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170 |
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171 | Parameters.Add(new FixedValueParameter<IntValue>(
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172 | MaxPointsInRandomInstructionParameterName,
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173 | MaxPointsInRandomInstructionParameterDescription,
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174 | new IntValue(config.MaxPointsInRandomExpression)) { Hidden = true });
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175 |
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176 | Parameters.Add(new ValueParameter<Data>(DataParameterName, DataParameterDescription));
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177 |
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178 | Encoding.Bounds[0, 0] = 0;
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179 | Encoding.Bounds[0, 1] = config.EnabledExpressions.Count - 1;
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180 | Encoding.Length = config.MaxPointsInProgram;
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181 | }
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182 |
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183 | public IValueParameter<IntMatrix> DataBoundsParameter
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184 | {
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185 | get { return (IValueParameter<IntMatrix>)Parameters[DataBoundsParameterName]; }
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186 | }
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187 |
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188 | public IntMatrix DataBounds
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189 | {
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190 | get { return DataBoundsParameter.Value; }
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191 | set { DataBoundsParameter.Value = value; }
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192 | }
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193 |
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194 |
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195 | public IValueParameter<IEnabledExpressionsConfiguration> InstructionsParameter
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196 | {
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197 | get { return (IValueParameter<IEnabledExpressionsConfiguration>)Parameters[InstructionsParameterName]; }
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198 | }
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199 |
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200 | public IEnabledExpressionsConfiguration Instructions
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201 | {
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202 | get { return InstructionsParameter.Value; }
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203 | set { InstructionsParameter.Value = value; }
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204 | }
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205 |
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206 | public IValueParameter<Data> DataParameter
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207 | {
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208 | get { return (IValueParameter<Data>)Parameters[DataParameterName]; }
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209 | }
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210 |
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211 | public Data Data
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212 | {
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213 | get { return DataParameter.Value; }
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214 | set { DataParameter.Value = value; }
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215 | }
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216 |
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217 | public IValueParameter<IntValue> EvalPushLimitParameter
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218 | {
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219 | get { return (IValueParameter<IntValue>)this.Parameters[EvalPushLimitParameterName]; }
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220 | }
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221 |
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222 | public int EvalPushLimit
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223 | {
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224 | get { return config.EvalPushLimit; }
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225 | set
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226 | {
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227 | this.EvalPushLimitParameter.Value.Value = value;
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228 | config.EvalPushLimit = value;
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229 | }
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230 | }
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231 |
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232 | public IValueParameter<IntValue> MaxProgramLengthParameter
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233 | {
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234 | get { return (IValueParameter<IntValue>)this.Parameters[MaxProgramLengthParameterName]; }
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235 | }
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236 |
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237 | public int MaxProgramLength
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238 | {
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239 | get { return config.MaxPointsInProgram; }
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240 | set
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241 | {
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242 | this.MaxProgramLengthParameter.Value.Value = value;
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243 | this.Encoding.LengthParameter.Value.Value = value;
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244 | config.MaxPointsInProgram = value;
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245 | }
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246 | }
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247 |
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248 | public IValueParameter<BoolValue> TopLevelPushParameter
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249 | {
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250 | get { return (IValueParameter<BoolValue>)this.Parameters[TopLevelPushCodeParameterName]; }
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251 | }
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252 |
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253 | public bool TopLevelPushCode
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254 | {
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255 | get { return config.TopLevelPushCode; }
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256 | set
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257 | {
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258 | this.TopLevelPushParameter.Value.Value = value;
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259 | config.TopLevelPushCode = value;
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260 | }
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261 | }
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262 |
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263 | public IValueParameter<BoolValue> TopLevelPopParameter
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264 | {
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265 | get { return (IValueParameter<BoolValue>)this.Parameters[TopLevelPopCodeParameterName]; }
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266 | }
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267 |
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268 | public bool TopLevelPopCode
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269 | {
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270 | get { return config.TopLevelPopCode; }
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271 | set
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272 | {
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273 | this.TopLevelPushParameter.Value.Value = value;
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274 | config.TopLevelPopCode = value;
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275 | }
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276 | }
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277 |
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278 | public IValueParameter<IntValue> MinRandomIntegerParameter
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279 | {
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280 | get { return (IValueParameter<IntValue>)this.Parameters[MinRandomIntegerParameterName]; }
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281 | }
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282 |
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283 | public int MinRandomInteger
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284 | {
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285 | get { return config.MinRandomInteger; }
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286 | set
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287 | {
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288 | this.MinRandomIntegerParameter.Value.Value = value;
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289 | config.MinRandomInteger = value;
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290 | }
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291 | }
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292 |
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293 | public IValueParameter<IntValue> MaxRandomIntegerParameter
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294 | {
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295 | get { return (IValueParameter<IntValue>)this.Parameters[MaxRandomIntegerParameterName]; }
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296 | }
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297 |
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298 | public int MaxRandomInteger
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299 | {
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300 | get { return config.MaxRandomInteger; }
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301 | set
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302 | {
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303 | this.MaxRandomIntegerParameter.Value.Value = value;
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304 | config.MaxRandomInteger = value;
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305 | }
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306 | }
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307 |
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308 | public IValueParameter<DoubleValue> MinRandomFloatParameter
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309 | {
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310 | get { return (IValueParameter<DoubleValue>)this.Parameters[MinRandomFloatParameterName]; }
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311 | }
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312 |
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313 | public double MinRandomFloat
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314 | {
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315 | get { return config.MinRandomFloat; }
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316 | set
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317 | {
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318 | this.MinRandomFloatParameter.Value.Value = value;
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319 | config.MinRandomFloat = value;
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320 | }
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321 | }
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322 |
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323 | public IValueParameter<DoubleValue> MaxRandomFloatParameter
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324 | {
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325 | get { return (IValueParameter<DoubleValue>)this.Parameters[MaxRandomFloatParameterName]; }
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326 | }
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327 |
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328 | public double MaxRandomFloat
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329 | {
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330 | get { return config.MaxRandomFloat; }
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331 | set
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332 | {
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333 | this.MaxRandomFloatParameter.Value.Value = value;
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334 | config.MaxRandomFloat = value;
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335 | }
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336 | }
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337 |
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338 | public IValueParameter<PercentValue> NewErcNameProbabilityParameter
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339 | {
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340 | get { return (IValueParameter<PercentValue>)this.Parameters[NewErcNameProbabilityParameterName]; }
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341 | }
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342 |
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343 | public double NewErcNameProbability
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344 | {
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345 | get { return config.NewErcNameProbability; }
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346 | set
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347 | {
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348 | this.NewErcNameProbabilityParameter.Value.Value = value;
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349 | config.NewErcNameProbability = value;
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350 | }
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351 | }
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352 |
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353 | public IValueParameter<PercentValue> ErcProbabilityParameter
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354 | {
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355 | get { return (IValueParameter<PercentValue>)this.Parameters[ErcProbabilityParameterName]; }
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356 | }
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357 |
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358 | public double ErcProbability
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359 | {
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360 | get { return config.ErcProbability; }
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361 | set
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362 | {
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363 | this.ErcProbabilityParameter.Value.Value = value;
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364 | config.ErcProbability = value;
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365 | }
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366 | }
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367 |
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368 | public IValueParameter<IntValue> MaxPointsInRandomInstructionParameter
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369 | {
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370 | get { return (IValueParameter<IntValue>)Parameters[MaxPointsInRandomInstructionParameterName]; }
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371 | }
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372 |
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373 | public int MaxPointsInRandomInstruction
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374 | {
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375 | get { return config.MaxPointsInRandomExpression; }
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376 | set
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377 | {
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378 | this.MaxPointsInRandomInstructionParameter.Value.Value = value;
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379 | config.MaxPointsInRandomExpression = value;
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380 | }
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381 | }
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382 |
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383 | #endregion
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384 |
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385 | public override bool Maximization { get { return false; } }
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386 |
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387 | public override IDeepCloneable Clone(Cloner cloner) {
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388 | return new PushProblem(this, cloner);
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389 | }
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390 |
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391 | public override void Analyze(Individual[] individuals, double[] qualities, ResultCollection results, IRandom random) {
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392 | const string bestSolutionResultName = "Best Solution";
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393 | var bestQuality = Maximization ? qualities.Max() : qualities.Min();
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394 | var bestIdx = Array.IndexOf(qualities, bestQuality);
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395 | var bestIndividual = individuals[bestIdx];
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396 | var program = bestIndividual.PushProgram(config.EnabledExpressions);
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397 | var solution = new PushSolution(program, bestQuality, Data, random, pool);
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398 |
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399 | if (!results.ContainsKey(bestSolutionResultName)) {
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400 | results.Add(new Result(bestSolutionResultName, solution));
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401 | } else if (((PushSolution)results[bestSolutionResultName].Value).Quality < qualities[bestIdx]) {
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402 | results[bestSolutionResultName].Value = solution;
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403 | }
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404 | }
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405 |
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406 | public override double Evaluate(Individual individual, IRandom random) {
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407 | var program = individual.PushProgram(config.EnabledExpressions);
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408 | var expandExpression = new ExecExpandExpression(program);
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409 | var results = new List<double>();
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410 |
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411 | using (var interpreter = pool.GetInstance(random)) {
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412 | for (var i = DataBounds[0, 0]; i < DataBounds[0, 1]; i++) {
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413 | var example = Data.Examples[i];
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414 |
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415 | interpreter.BooleanStack.Push(example.InputBoolean);
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416 | interpreter.IntegerStack.Push(example.InputInt);
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417 | interpreter.FloatStack.Push(example.InputFloat);
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418 |
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419 | interpreter.Run(expandExpression);
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420 |
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421 | var diff = GetDiff(example.OutputInt, interpreter.IntegerStack, Data.WorstResult, LongDiffer) +
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422 | GetDiff(example.OutputFloat, interpreter.FloatStack, Data.WorstResult, DoubleDiffer) +
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423 | GetDiff(example.OutputBoolean, interpreter.BooleanStack, Data.WorstResult, BooleanDiffer);
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424 |
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425 | results.Add(diff);
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426 | interpreter.Clear();
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427 | }
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428 | }
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429 |
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430 | return results.Count == 0 ? 0d : results.Average();
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431 | }
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432 |
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433 | private static double DoubleDiffer(double a, double b) {
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434 | var result = a - b;
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435 |
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436 | return result == double.MinValue ? double.MaxValue : Math.Abs(result);
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437 | }
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438 |
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439 | private static double LongDiffer(long a, long b) {
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440 | var result = a - b;
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441 |
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442 | return result == long.MinValue ? long.MaxValue : Math.Abs(result);
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443 | }
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444 |
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445 | private static double BooleanDiffer(bool a, bool b) {
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446 | return a && b ? 0 : a || b ? 1 : 2;
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447 | }
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448 |
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449 | private static double GetDiff<T>(IReadOnlyList<T> estimated, IStack<T> resultStack, double worstResult, Func<T, T, double> differ)
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450 | where T : IComparable {
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451 |
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452 | var count = Math.Min(estimated.Count, resultStack.Count);
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453 | var result = resultStack.Peek(count);
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454 | var comparableLength = Math.Min(estimated.Count, result.Length);
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455 | var diff = 0d;
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456 |
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457 | for (var i = 0; i < comparableLength; i++) {
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458 | diff += Math.Min(differ(estimated[i], result[0]), worstResult);
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459 | }
|
---|
460 |
|
---|
461 | if (estimated.Count > result.Length) {
|
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462 | diff += worstResult * (estimated.Count - comparableLength);
|
---|
463 | }
|
---|
464 |
|
---|
465 | return diff;
|
---|
466 | }
|
---|
467 |
|
---|
468 | public void Load(Data data) {
|
---|
469 | Data = data;
|
---|
470 | BestKnownQuality = data.BestResult;
|
---|
471 |
|
---|
472 | DataBounds[0, 0] = 0;
|
---|
473 | DataBounds[0, 2] = Data.OriginalTrainingCount + Data.OriginalTestCount;
|
---|
474 | DataBounds[0, 1] = Data.OriginalTrainingCount;
|
---|
475 | }
|
---|
476 | }
|
---|
477 | }
|
---|