| 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2010 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.Core;
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| 23 | using HeuristicLab.Data;
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| 24 | using HeuristicLab.Operators;
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| 25 | using HeuristicLab.Parameters;
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| 26 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 27 |
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| 28 | namespace HeuristicLab.Analysis {
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| 29 | /// <summary>
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| 30 | /// An operator which calculates the best, average and worst solution quality of the current population.
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| 31 | /// </summary>
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| 32 | [Item("BestAverageWorstQualityCalculator", "An operator which calculates the best, average and worst solution quality of the current population.")]
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| 33 | [StorableClass]
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| 34 | public sealed class BestAverageWorstQualityCalculator : SingleSuccessorOperator {
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| 35 | public IValueLookupParameter<BoolValue> MaximizationParameter {
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| 36 | get { return (IValueLookupParameter<BoolValue>)Parameters["Maximization"]; }
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| 37 | }
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| 38 | public ILookupParameter<ItemArray<DoubleValue>> QualityParameter {
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| 39 | get { return (ILookupParameter<ItemArray<DoubleValue>>)Parameters["Quality"]; }
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| 40 | }
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| 41 | public IValueLookupParameter<DoubleValue> BestQualityParameter {
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| 42 | get { return (IValueLookupParameter<DoubleValue>)Parameters["BestQuality"]; }
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| 43 | }
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| 44 | public IValueLookupParameter<DoubleValue> AverageQualityParameter {
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| 45 | get { return (IValueLookupParameter<DoubleValue>)Parameters["AverageQuality"]; }
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| 46 | }
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| 47 | public IValueLookupParameter<DoubleValue> WorstQualityParameter {
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| 48 | get { return (IValueLookupParameter<DoubleValue>)Parameters["WorstQuality"]; }
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| 49 | }
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| 50 |
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| 51 | public BestAverageWorstQualityCalculator()
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| 52 | : base() {
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| 53 | Parameters.Add(new ValueLookupParameter<BoolValue>("Maximization", "True if the current problem is a maximization problem, otherwise false."));
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| 54 | Parameters.Add(new SubScopesLookupParameter<DoubleValue>("Quality", "The value contained in each sub-scope which represents the solution quality."));
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| 55 | Parameters.Add(new ValueLookupParameter<DoubleValue>("BestQuality", "The quality value of the best solution."));
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| 56 | Parameters.Add(new ValueLookupParameter<DoubleValue>("AverageQuality", "The average quality of all solutions."));
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| 57 | Parameters.Add(new ValueLookupParameter<DoubleValue>("WorstQuality", "The quality value of the worst solution."));
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| 58 | }
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| 59 |
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| 60 |
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| 61 | public override IOperation Apply() {
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| 62 | ItemArray<DoubleValue> qualities = QualityParameter.ActualValue;
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| 63 | bool maximization = MaximizationParameter.ActualValue.Value;
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| 64 |
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| 65 | if (qualities.Length > 0) {
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| 66 | double min = double.MaxValue, max = double.MinValue, sum = 0.0;
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| 67 | for (int i = 0; i < qualities.Length; i++) {
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| 68 | if (qualities[i].Value < min) min = qualities[i].Value;
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| 69 | if (qualities[i].Value > max) max = qualities[i].Value;
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| 70 | sum += qualities[i].Value;
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| 71 | }
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| 72 | if (!maximization) {
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| 73 | double temp = min;
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| 74 | min = max;
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| 75 | max = temp;
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| 76 | }
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| 77 |
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| 78 | DoubleValue best = BestQualityParameter.ActualValue;
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| 79 | if (best == null) BestQualityParameter.ActualValue = new DoubleValue(max);
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| 80 | else best.Value = max;
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| 81 | DoubleValue average = AverageQualityParameter.ActualValue;
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| 82 | if (average == null) AverageQualityParameter.ActualValue = new DoubleValue(sum / qualities.Length);
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| 83 | else average.Value = sum / qualities.Length;
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| 84 | DoubleValue worst = WorstQualityParameter.ActualValue;
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| 85 | if (worst == null) WorstQualityParameter.ActualValue = new DoubleValue(min);
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| 86 | else worst.Value = min;
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| 87 | }
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| 88 | return base.Apply();
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| 89 | }
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| 90 | }
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| 91 | }
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