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.Collections.Generic;
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23 | using System.Linq;
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24 | using HeuristicLab.Common;
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25 | using HeuristicLab.Core;
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26 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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28 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
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29 | [StorableClass]
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30 | [Item("TypeCoherentExpressionGrammar", "Represents a grammar for functional expressions in which special syntactic constraints are enforced so that boolean and real-valued expressions are not mixed.")]
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31 | public class TypeCoherentExpressionGrammar : SymbolicExpressionGrammar, ISymbolicDataAnalysisGrammar {
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32 | private const string ArithmeticFunctionsName = "Arithmetic Functions";
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33 | private const string TrigonometricFunctionsName = "Trigonometric Functions";
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34 | private const string ExponentialFunctionsName = "Exponential and Logarithmic Functions";
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35 | private const string RealValuedSymbolsName = "Real Valued Symbols";
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36 | private const string TerminalsName = "Terminals";
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37 | private const string PowerFunctionsName = "Power Functions";
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38 | private const string ConditionsName = "Conditions";
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39 | private const string ComparisonsName = "Comparisons";
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40 | private const string BooleanOperatorsName = "Boolean Operators";
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41 | private const string ConditionalSymbolsName = "ConditionalSymbols";
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42 | private const string TimeSeriesSymbolsName = "Time Series Symbols";
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43 |
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44 | [StorableConstructor]
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45 | protected TypeCoherentExpressionGrammar(bool deserializing) : base(deserializing) { }
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46 | protected TypeCoherentExpressionGrammar(TypeCoherentExpressionGrammar original, Cloner cloner) : base(original, cloner) { }
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47 | public TypeCoherentExpressionGrammar()
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48 | : base(ItemAttribute.GetName(typeof(TypeCoherentExpressionGrammar)), ItemAttribute.GetDescription(typeof(TypeCoherentExpressionGrammar))) {
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49 | Initialize();
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50 | }
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51 | public override IDeepCloneable Clone(Cloner cloner) {
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52 | return new TypeCoherentExpressionGrammar(this, cloner);
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53 | }
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54 |
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55 | private void Initialize() {
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56 | #region symbol declaration
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57 | var add = new Addition();
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58 | var sub = new Subtraction();
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59 | var mul = new Multiplication();
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60 | var div = new Division();
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61 | var mean = new Average();
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62 | var sin = new Sine();
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63 | var cos = new Cosine();
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64 | var tan = new Tangent();
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65 | var log = new Logarithm();
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66 | var pow = new Power();
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67 | var root = new Root();
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68 | var exp = new Exponential();
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69 | var @if = new IfThenElse();
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70 | var gt = new GreaterThan();
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71 | var lt = new LessThan();
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72 | var and = new And();
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73 | var or = new Or();
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74 | var not = new Not();
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75 | var variableCondition = new VariableCondition();
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76 |
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77 | var timeLag = new TimeLag();
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78 | var integral = new Integral();
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79 | var derivative = new Derivative();
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80 |
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81 | var constant = new Constant();
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82 | constant.MinValue = -20;
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83 | constant.MaxValue = 20;
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84 | var variableSymbol = new Variable();
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85 | var laggedVariable = new LaggedVariable();
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86 | #endregion
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87 |
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88 | #region group symbol declaration
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89 | var arithmeticSymbols = new GroupSymbol(ArithmeticFunctionsName, new List<ISymbol>() { add, sub, mul, div, mean });
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90 | var trigonometricSymbols = new GroupSymbol(TrigonometricFunctionsName, new List<ISymbol>() { sin, cos, tan });
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91 | var exponentialAndLogarithmicSymbols = new GroupSymbol(ExponentialFunctionsName, new List<ISymbol> { exp, log });
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92 | var terminalSymbols = new GroupSymbol(TerminalsName, new List<ISymbol> { constant, variableSymbol });
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93 | var realValuedSymbols = new GroupSymbol(RealValuedSymbolsName, new List<ISymbol>() { arithmeticSymbols, trigonometricSymbols, exponentialAndLogarithmicSymbols, terminalSymbols });
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94 |
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95 | var powerSymbols = new GroupSymbol(PowerFunctionsName, new List<ISymbol> { pow, root });
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96 |
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97 | var conditionSymbols = new GroupSymbol(ConditionsName, new List<ISymbol> { @if, variableCondition });
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98 | var comparisonSymbols = new GroupSymbol(ComparisonsName, new List<ISymbol> { gt, lt });
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99 | var booleanOperationSymbols = new GroupSymbol(BooleanOperatorsName, new List<ISymbol> { and, or, not });
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100 | var conditionalSymbols = new GroupSymbol(ConditionalSymbolsName, new List<ISymbol> { conditionSymbols, comparisonSymbols, booleanOperationSymbols });
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101 |
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102 | var timeSeriesSymbols = new GroupSymbol(TimeSeriesSymbolsName, new List<ISymbol> { timeLag, integral, derivative, laggedVariable });
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103 | #endregion
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104 |
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105 | AddSymbol(realValuedSymbols);
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106 | AddSymbol(powerSymbols);
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107 | AddSymbol(conditionalSymbols);
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108 | AddSymbol(timeSeriesSymbols);
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109 |
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110 | #region subtree count configuration
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111 | SetSubtreeCount(arithmeticSymbols, 2, 2);
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112 | SetSubtreeCount(trigonometricSymbols, 1, 1);
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113 | SetSubtreeCount(powerSymbols, 2, 2);
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114 | SetSubtreeCount(exponentialAndLogarithmicSymbols, 1, 1);
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115 | SetSubtreeCount(terminalSymbols, 0, 0);
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116 |
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117 | SetSubtreeCount(@if, 3, 3);
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118 | SetSubtreeCount(variableCondition, 2, 2);
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119 | SetSubtreeCount(comparisonSymbols, 2, 2);
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120 | SetSubtreeCount(and, 2, 2);
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121 | SetSubtreeCount(or, 2, 2);
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122 | SetSubtreeCount(not, 1, 1);
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123 |
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124 | SetSubtreeCount(timeLag, 1, 1);
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125 | SetSubtreeCount(integral, 1, 1);
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126 | SetSubtreeCount(derivative, 1, 1);
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127 | SetSubtreeCount(laggedVariable, 0, 0);
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128 | #endregion
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129 |
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130 | #region allowed child symbols configuration
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131 | AddAllowedChildSymbol(StartSymbol, realValuedSymbols);
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132 | AddAllowedChildSymbol(DefunSymbol, realValuedSymbols);
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133 |
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134 | AddAllowedChildSymbol(realValuedSymbols, realValuedSymbols);
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135 | AddAllowedChildSymbol(realValuedSymbols, powerSymbols);
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136 | AddAllowedChildSymbol(realValuedSymbols, conditionSymbols);
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137 | AddAllowedChildSymbol(realValuedSymbols, timeSeriesSymbols);
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138 |
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139 | AddAllowedChildSymbol(powerSymbols, variableSymbol, 0);
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140 | AddAllowedChildSymbol(powerSymbols, laggedVariable, 0);
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141 | AddAllowedChildSymbol(powerSymbols, constant, 1);
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142 |
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143 | AddAllowedChildSymbol(@if, comparisonSymbols, 0);
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144 | AddAllowedChildSymbol(@if, booleanOperationSymbols, 0);
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145 | AddAllowedChildSymbol(@if, conditionSymbols, 1);
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146 | AddAllowedChildSymbol(@if, realValuedSymbols, 1);
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147 | AddAllowedChildSymbol(@if, powerSymbols, 1);
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148 | AddAllowedChildSymbol(@if, timeSeriesSymbols, 1);
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149 | AddAllowedChildSymbol(@if, conditionSymbols, 2);
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150 | AddAllowedChildSymbol(@if, realValuedSymbols, 2);
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151 | AddAllowedChildSymbol(@if, powerSymbols, 2);
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152 | AddAllowedChildSymbol(@if, timeSeriesSymbols, 2);
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153 |
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154 | AddAllowedChildSymbol(booleanOperationSymbols, comparisonSymbols);
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155 | AddAllowedChildSymbol(comparisonSymbols, realValuedSymbols);
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156 | AddAllowedChildSymbol(comparisonSymbols, powerSymbols);
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157 | AddAllowedChildSymbol(comparisonSymbols, conditionSymbols);
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158 | AddAllowedChildSymbol(comparisonSymbols, timeSeriesSymbols);
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159 |
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160 | AddAllowedChildSymbol(variableCondition, realValuedSymbols);
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161 | AddAllowedChildSymbol(variableCondition, powerSymbols);
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162 | AddAllowedChildSymbol(variableCondition, conditionSymbols);
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163 | AddAllowedChildSymbol(variableCondition, timeSeriesSymbols);
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164 |
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165 |
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166 | AddAllowedChildSymbol(timeLag, realValuedSymbols);
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167 | AddAllowedChildSymbol(timeLag, powerSymbols);
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168 | AddAllowedChildSymbol(timeLag, conditionSymbols);
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169 |
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170 | AddAllowedChildSymbol(integral, realValuedSymbols);
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171 | AddAllowedChildSymbol(integral, powerSymbols);
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172 | AddAllowedChildSymbol(integral, conditionSymbols);
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173 |
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174 | AddAllowedChildSymbol(derivative, realValuedSymbols);
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175 | AddAllowedChildSymbol(derivative, powerSymbols);
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176 | AddAllowedChildSymbol(derivative, conditionSymbols);
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177 | #endregion
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178 | }
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179 |
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180 | public void ConfigureAsDefaultRegressionGrammar() {
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181 | Symbols.Where(s => s is Average).First().Enabled = false;
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182 | Symbols.Where(s => s.Name == TrigonometricFunctionsName).First().Enabled = false;
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183 | Symbols.Where(s => s.Name == PowerFunctionsName).First().Enabled = false;
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184 | Symbols.Where(s => s.Name == ConditionalSymbolsName).First().Enabled = false;
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185 | Symbols.Where(s => s.Name == TimeSeriesSymbolsName).First().Enabled = false;
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186 | }
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187 |
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188 | public void ConfigureAsDefaultClassificationGrammar() {
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189 | Symbols.Where(s => s is Average).First().Enabled = false;
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190 | Symbols.Where(s => s is VariableCondition).First().Enabled = false;
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191 | Symbols.Where(s => s.Name == TrigonometricFunctionsName).First().Enabled = false;
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192 | Symbols.Where(s => s.Name == ExponentialFunctionsName).First().Enabled = false;
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193 | Symbols.Where(s => s.Name == PowerFunctionsName).First().Enabled = false;
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194 | Symbols.Where(s => s.Name == TimeSeriesSymbolsName).First().Enabled = false;
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195 | }
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196 |
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197 | public void ConfigureAsDefaultTimeSeriesPrognosisGrammar() {
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198 | Symbols.Where(s => s is Variable).First().Enabled = false;
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199 | Symbols.Where(s => s.Name == TrigonometricFunctionsName).First().Enabled = false;
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200 | Symbols.Where(s => s.Name == PowerFunctionsName).First().Enabled = false;
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201 | Symbols.Where(s => s.Name == ConditionalSymbolsName).First().Enabled = false;
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202 | }
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203 | }
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204 | }
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