[14233] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2016 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 HeuristicLab.Common;
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| 23 | using HeuristicLab.Core;
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| 24 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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| 25 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 26 | using HeuristicLab.Random;
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| 27 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
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| 28 | [StorableClass]
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[14237] | 29 | public class FactorVariableTreeNode : VariableTreeNodeBase {
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[14233] | 30 | public new FactorVariable Symbol {
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| 31 | get { return (FactorVariable)base.Symbol; }
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| 32 | }
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| 33 |
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| 34 | [Storable]
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| 35 | private string variableValue;
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| 36 | public string VariableValue {
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| 37 | get { return variableValue; }
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| 38 | set { variableValue = value; }
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| 39 | }
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| 40 |
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| 41 | [StorableConstructor]
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| 42 | protected FactorVariableTreeNode(bool deserializing) : base(deserializing) { }
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| 43 | protected FactorVariableTreeNode(FactorVariableTreeNode original, Cloner cloner)
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| 44 | : base(original, cloner) {
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| 45 | variableValue = original.variableValue;
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| 46 | }
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| 47 | protected FactorVariableTreeNode() { }
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| 48 | public FactorVariableTreeNode(FactorVariable variableSymbol) : base(variableSymbol) { }
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| 49 |
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| 50 | public override bool HasLocalParameters {
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| 51 | get { return true; }
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| 52 | }
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| 53 |
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| 54 | public override void ResetLocalParameters(IRandom random) {
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| 55 | base.ResetLocalParameters(random);
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| 56 | variableValue = Symbol.GetVariableValues(VariableName).SampleRandom(random);
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| 57 | }
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| 58 |
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| 59 | public override void ShakeLocalParameters(IRandom random, double shakingFactor) {
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[14237] | 60 | // 50% additive & 50% multiplicative
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| 61 | if (random.NextDouble() < 0.5) {
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| 62 | double x = NormalDistributedRandom.NextDouble(random, Symbol.WeightManipulatorMu, Symbol.WeightManipulatorSigma);
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| 63 | Weight = Weight + x * shakingFactor;
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| 64 | } else {
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| 65 | double x = NormalDistributedRandom.NextDouble(random, 1.0, Symbol.MultiplicativeWeightManipulatorSigma);
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| 66 | Weight = Weight * x;
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| 67 | }
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[14233] | 68 | if (random.NextDouble() < 0.2) {
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[14237] | 69 | VariableName = Symbol.VariableNames.SampleRandom(random);
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[14233] | 70 | }
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| 71 | variableValue = Symbol.GetVariableValues(VariableName).SampleRandom(random);
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| 72 | }
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| 73 |
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| 74 | public override IDeepCloneable Clone(Cloner cloner) {
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| 75 | return new FactorVariableTreeNode(this, cloner);
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| 76 | }
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| 77 |
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| 78 | public override string ToString() {
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[14237] | 79 | return base.ToString() + " = " + variableValue;
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[14233] | 80 | }
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| 81 | }
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| 82 | }
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