[9331] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2012 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 |
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| 23 | using System;
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| 24 | using System.Linq;
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| 25 | using HeuristicLab.Common;
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| 26 | using HeuristicLab.Core;
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| 27 | using HeuristicLab.Data;
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| 28 | using HeuristicLab.Optimization;
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| 29 | using HeuristicLab.Parameters;
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| 30 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 31 |
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| 32 | namespace HeuristicLab.Analysis.AlgorithmBehavior.Analyzers {
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| 33 | [Item("SelectionPressureAnalyzer", "An operator that analyzes the current selection pressure.")]
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| 34 | [StorableClass]
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| 35 | public class SelectionPressureAnalyzer : InitializableOperator, IStatefulItem {
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| 36 | private const string ResultsParameterName = "Results";
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| 37 | private const string GenerationsParameterName = "Generations";
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| 38 | [Storable]
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| 39 | public string SolutionQualityName { get; set; }
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| 40 |
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| 41 | #region Parameter properties
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| 42 | public IValueLookupParameter<BoolValue> MaximizationParameter {
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| 43 | get { return (IValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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| 44 | }
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| 45 | public ILookupParameter<ResultCollection> ResultsParameter {
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| 46 | get { return (ILookupParameter<ResultCollection>)Parameters[ResultsParameterName]; }
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| 47 | }
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| 48 | public ILookupParameter<IntValue> GenerationsParameter {
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| 49 | get { return (ILookupParameter<IntValue>)Parameters[GenerationsParameterName]; }
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| 50 | }
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| 51 | public ILookupParameter<DoubleValue> BestKnownQualityParameter {
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| 52 | get { return (ILookupParameter<DoubleValue>)Parameters["BestKnownQuality"]; }
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| 53 | }
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| 54 | public ILookupParameter<DoubleValue> WorstKnownQualityParameter {
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| 55 | get { return (ILookupParameter<DoubleValue>)Parameters["WorstKnownQuality"]; }
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| 56 | }
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| 57 | public ILookupParameter<ItemArray<DoubleValue>> ParentsQualityParameter {
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| 58 | get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["ParentsQuality"]; }
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| 59 | }
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| 60 | #endregion
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| 61 |
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| 62 | #region Properties
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| 63 | public ResultCollection Results {
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| 64 | get { return ResultsParameter.ActualValue; }
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| 65 | }
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| 66 | [Storable]
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| 67 | private ScatterPlotHelper selPressurePlot;
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| 68 | [Storable]
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| 69 | private int cnt = 0;
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| 70 | [Storable]
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| 71 | private int lastGeneration = 0;
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| 72 | #endregion
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| 73 |
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| 74 | [StorableConstructor]
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| 75 | private SelectionPressureAnalyzer(bool deserializing) : base(deserializing) { }
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| 76 | private SelectionPressureAnalyzer(SelectionPressureAnalyzer original, Cloner cloner)
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| 77 | : base(original, cloner) {
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| 78 | cnt = original.cnt;
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| 79 | lastGeneration = original.lastGeneration;
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| 80 | selPressurePlot = (ScatterPlotHelper)original.selPressurePlot.Clone(cloner);
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| 81 | SolutionQualityName = original.SolutionQualityName;
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| 82 | }
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| 83 |
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| 84 | public SelectionPressureAnalyzer()
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| 85 | : base() {
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| 86 | Parameters.Add(new LookupParameter<ResultCollection>(ResultsParameterName, "The results collection where the analysis values should be stored."));
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| 87 | Parameters.Add(new LookupParameter<IntValue>(GenerationsParameterName, "Nr of generations."));
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| 88 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the problem is a maximization problem, false otherwise"));
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| 89 | Parameters.Add(new LookupParameter<DoubleValue>("BestKnownQuality", "The quality of the best known solution of this problem."));
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| 90 | Parameters.Add(new LookupParameter<DoubleValue>("WorstKnownQuality", "The quality of the worst known solution of this problem."));
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| 91 | Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("ParentsQuality", "The quality of the parent solutions."));
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| 92 | SolutionQualityName = "TSPTourLength";
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| 93 |
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| 94 | selPressurePlot = new ScatterPlotHelper(false, true, true, false);
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| 95 | }
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| 96 |
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| 97 | public override IDeepCloneable Clone(Cloner cloner) {
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| 98 | return new SelectionPressureAnalyzer(this, cloner);
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| 99 | }
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| 100 |
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| 101 | protected override void InitializeAction() {
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| 102 | selPressurePlot.InitializePlot(Results, "Selection Pressure", "Solution Index", "Quality Difference");
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| 103 | ParentsQualityParameter.ActualName = SolutionQualityName;
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| 104 |
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| 105 | Reset();
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| 106 | }
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| 107 |
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| 108 | public override IOperation Apply() {
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| 109 | Initialize();
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| 110 |
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| 111 | string curGenStr = GenerationsParameter.ActualValue.Value.ToString();
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| 112 |
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| 113 | IScope oldPop = ReverseScopeTreeLookup("Remaining");
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| 114 | if (oldPop == null)
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| 115 | throw new Exception("Couldn't find the remaining scope");
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| 116 |
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| 117 | if (GenerationsParameter.ActualValue.Value != 0) {
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| 118 | if (GenerationsParameter.ActualValue.Value > lastGeneration) {
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| 119 | Reset();
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| 120 | }
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| 121 |
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| 122 | double oldPopQuality = 0.0;
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| 123 | int popSize = 0;
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| 124 | foreach (IScope oldSolScope in oldPop.SubScopes) {
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| 125 | double curQuality = ((DoubleValue)oldSolScope.Variables[SolutionQualityName].Value).Value;
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| 126 | oldPopQuality += curQuality;
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| 127 | popSize++;
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| 128 | }
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| 129 |
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| 130 | double quality = ParentsQualityParameter.ActualValue.Average(x => x.Value);
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| 131 |
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| 132 | if (GenerationsParameter.ActualValue.Value == 1) {
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| 133 | double bkQuality = BestKnownQualityParameter.ActualValue.Value;
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| 134 | double wkQuality = WorstKnownQualityParameter.ActualValue.Value;
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| 135 |
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| 136 | if (MaximizationParameter.ActualValue.Value) {
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| 137 | if (selPressurePlot.Max == double.MinValue) {
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| 138 | selPressurePlot.Max = bkQuality - wkQuality;
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| 139 | selPressurePlot.Min = 0;
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| 140 | }
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| 141 | } else {
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| 142 | if (selPressurePlot.Min == double.MaxValue) {
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| 143 | selPressurePlot.Max = wkQuality - bkQuality;
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| 144 | selPressurePlot.Min = 0;
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| 145 | }
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| 146 | }
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| 147 | }
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| 148 |
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| 149 | Point2D<double> popQualityPoint;
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| 150 | if (MaximizationParameter.ActualValue.Value) {
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| 151 | popQualityPoint = new Point2D<double>(cnt, quality - (oldPopQuality / popSize));
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| 152 | } else {
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| 153 | popQualityPoint = new Point2D<double>(cnt, (oldPopQuality / popSize) - quality);
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| 154 | }
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| 155 |
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| 156 | selPressurePlot.AddPoint(curGenStr, popQualityPoint);
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| 157 | }
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| 158 |
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| 159 | return base.Apply();
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| 160 | }
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| 161 |
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| 162 | private void Reset() {
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| 163 | cnt = 0;
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| 164 | lastGeneration = GenerationsParameter.ActualValue.Value;
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| 165 | }
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| 166 |
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| 167 | public override void ClearState() {
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| 168 | selPressurePlot.CleanUp();
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| 169 | }
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| 170 |
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| 171 | private IScope ReverseScopeTreeLookup(string scopeName) {
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| 172 | var currentScope = ExecutionContext.Scope;
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| 173 | while (currentScope != null) {
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| 174 | var scopes = currentScope.SubScopes.Where(x => x.Name == scopeName);
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| 175 | if (scopes.Count() > 0)
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| 176 | return scopes.First();
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| 177 |
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| 178 | currentScope = currentScope.Parent;
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| 179 | }
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| 180 | return null;
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| 181 | }
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| 182 | }
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| 183 | }
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