[5333] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[5445] | 3 | * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[5333] | 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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[5393] | 22 | using System.Collections.Generic;
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[5333] | 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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[5686] | 31 | public class TypeCoherentExpressionGrammar : SymbolicExpressionGrammar, ISymbolicDataAnalysisGrammar {
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[6803] | 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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[5333] | 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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[5688] | 48 | : base(ItemAttribute.GetName(typeof(TypeCoherentExpressionGrammar)), ItemAttribute.GetDescription(typeof(TypeCoherentExpressionGrammar))) {
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[5333] | 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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[6803] | 56 | #region symbol declaration
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[5333] | 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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[5393] | 67 | var root = new Root();
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[5333] | 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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[6803] | 75 | var variableCondition = new VariableCondition();
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[5393] | 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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[5333] | 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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[6803] | 84 | var variableSymbol = new Variable();
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[5333] | 85 | var laggedVariable = new LaggedVariable();
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[6803] | 86 | #endregion
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[5333] | 87 |
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[6803] | 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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[5333] | 94 |
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[6803] | 95 | var powerSymbols = new GroupSymbol(PowerFunctionsName, new List<ISymbol> { pow, root });
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[5333] | 96 |
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[6803] | 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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[5333] | 101 |
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[6803] | 102 | var timeSeriesSymbols = new GroupSymbol(TimeSeriesSymbolsName, new List<ISymbol> { timeLag, integral, derivative, laggedVariable });
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| 103 | #endregion
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[5333] | 104 |
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[6803] | 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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[5333] | 109 |
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[6803] | 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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[5333] | 116 |
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[6803] | 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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[5333] | 123 |
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[6803] | 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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[5333] | 129 |
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[6819] | 130 | #region allowed child symbols configuration
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[6803] | 131 | AddAllowedChildSymbol(StartSymbol, realValuedSymbols);
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| 132 | AddAllowedChildSymbol(DefunSymbol, realValuedSymbols);
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[5333] | 133 |
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[6803] | 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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[5333] | 138 |
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[6803] | 139 | AddAllowedChildSymbol(powerSymbols, variableSymbol, 0);
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[7071] | 140 | AddAllowedChildSymbol(powerSymbols, laggedVariable, 0);
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[6803] | 141 | AddAllowedChildSymbol(powerSymbols, constant, 1);
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[5333] | 142 |
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[6803] | 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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[5333] | 153 |
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[6803] | 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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[5333] | 159 |
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[6803] | 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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[5333] | 164 |
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[6803] | 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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[5333] | 178 | }
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[6803] | 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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[6999] | 190 | Symbols.Where(s => s is VariableCondition).First().Enabled = false;
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[6803] | 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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[6811] | 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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[5333] | 203 | }
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| 204 | }
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