[3032] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[14185] | 3 | * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[3032] | 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;
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[4722] | 23 | using HeuristicLab.Common;
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[3032] | 24 | using HeuristicLab.Core;
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| 25 | using HeuristicLab.Data;
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| 26 | using HeuristicLab.Parameters;
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| 27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 28 |
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[3053] | 29 | namespace HeuristicLab.Encodings.IntegerVectorEncoding {
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[3032] | 30 | /// <summary>
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| 31 | /// Uniformly distributed change of a single position of an integer vector.
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| 32 | /// </summary>
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| 33 | /// <remarks>
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| 34 | /// It is implemented as described in Michalewicz, Z. 1999. Genetic Algorithms + Data Structures = Evolution Programs. Third, Revised and Extended Edition, Spring-Verlag Berlin Heidelberg.
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| 35 | /// </remarks>
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| 36 | [Item("UniformOnePositionManipulator", " Uniformly distributed change of a single position of an integer vector. It is implemented as described in Michalewicz, Z. 1999. Genetic Algorithms + Data Structures = Evolution Programs. Third, Revised and Extended Edition, Spring-Verlag Berlin Heidelberg.")]
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| 37 | [StorableClass]
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[8019] | 38 | public class UniformOnePositionManipulator : BoundedIntegerVectorManipulator {
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[3032] | 39 |
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[4722] | 40 | [StorableConstructor]
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| 41 | protected UniformOnePositionManipulator(bool deserializing) : base(deserializing) { }
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| 42 | protected UniformOnePositionManipulator(UniformOnePositionManipulator original, Cloner cloner) : base(original, cloner) { }
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[3032] | 43 | /// <summary>
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| 44 | /// Initializes a new instance of <see cref="UniformOnePositionManipulator"/> with two parameters
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| 45 | /// (<c>Minimum</c> and <c>Maximum</c>).
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| 46 | /// </summary>
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[8019] | 47 | public UniformOnePositionManipulator() : base() { }
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[3032] | 48 |
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[4722] | 49 | public override IDeepCloneable Clone(Cloner cloner) {
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| 50 | return new UniformOnePositionManipulator(this, cloner);
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| 51 | }
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| 52 |
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[8019] | 53 | // BackwardsCompatibility3.3
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| 54 | #region Backwards compatible code, remove with 3.4
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| 55 | [StorableHook(HookType.AfterDeserialization)]
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| 56 | private void AfterDeserialization() {
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| 57 | if (!Parameters.ContainsKey("Bounds")) {
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| 58 | var min = ((IValueLookupParameter<IntValue>)Parameters["Minimum"]).Value as IntValue;
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| 59 | var max = ((IValueLookupParameter<IntValue>)Parameters["Maximum"]).Value as IntValue;
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| 60 | Parameters.Remove("Minimum");
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| 61 | Parameters.Remove("Maximum");
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| 62 | Parameters.Add(new ValueLookupParameter<IntMatrix>("Bounds", "The bounds matrix can contain one row for each dimension with three columns specifying minimum (inclusive), maximum (exclusive), and step size. If less rows are given the matrix is cycled."));
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| 63 | if (min != null && max != null) {
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| 64 | BoundsParameter.Value = new IntMatrix(new int[,] { { min.Value, max.Value, 1 } });
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| 65 | }
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| 66 | }
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| 67 | }
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| 68 | #endregion
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| 69 |
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[3032] | 70 | /// <summary>
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| 71 | /// Changes randomly a single position in the given integer <paramref name="vector"/>.
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| 72 | /// </summary>
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| 73 | /// <param name="random">A random number generator.</param>
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| 74 | /// <param name="vector">The integer vector to manipulate.</param>
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| 75 | /// <param name="min">The minimum value of the sampling range for
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| 76 | /// the vector element to change (inclusive).</param>
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| 77 | /// <param name="max">The maximum value of the sampling range for
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| 78 | /// the vector element to change (exclusive).</param>
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[8019] | 79 | /// <param name="bounds">The bounds and step size for each dimension (will be cycled in case there are less rows than elements in the parent vectors).</param>
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| 80 | public static void Apply(IRandom random, IntegerVector vector, IntMatrix bounds) {
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| 81 | Manipulate(random, vector, bounds, random.Next(vector.Length));
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[3032] | 82 | }
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| 83 |
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[8019] | 84 | public static void Manipulate(IRandom random, IntegerVector vector, IntMatrix bounds, int index) {
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| 85 | if (bounds == null || bounds.Rows == 0 || bounds.Columns < 2) throw new ArgumentException("UniformOnePositionManipulator: Invalid bounds specified", "bounds");
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| 86 | int min = bounds[index % bounds.Rows, 0], max = bounds[index % bounds.Rows, 1], step = 1;
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[8790] | 87 | if (min == max) {
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| 88 | vector[index] = min;
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| 89 | } else {
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| 90 | if (bounds.Columns > 2) step = bounds[index % bounds.Rows, 2];
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| 91 | // max has to be rounded to the lower feasible value
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| 92 | // e.g. min...max / step = 0...100 / 5, max is exclusive so it would be 0..99
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| 93 | // but 99 is not a feasible value, so max needs to be adjusted => min = 0, max = 95
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| 94 | max = FloorFeasible(min, max, step, max - 1);
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| 95 | vector[index] = RoundFeasible(min, max, step, random.Next(min, max));
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| 96 | }
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[8019] | 97 | }
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| 98 |
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[3032] | 99 | /// <summary>
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| 100 | /// Changes randomly a single position in the given integer <paramref name="vector"/>.
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| 101 | /// </summary>
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| 102 | /// <remarks>Calls <see cref="Apply"/>.</remarks>
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| 103 | /// <param name="random">A random number generator.</param>
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| 104 | /// <param name="vector">The integer vector to manipulate.</param>
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[8019] | 105 | /// <param name="bounds">The bounds and step size for each dimension (will be cycled in case there are less rows than elements in the parent vectors).</param>
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| 106 | protected override void ManipulateBounded(IRandom random, IntegerVector vector, IntMatrix bounds) {
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| 107 | if (BoundsParameter.ActualValue == null) throw new InvalidOperationException("UniformOnePositionManipulator: Parameter " + BoundsParameter.ActualName + " could not be found.");
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| 108 | Apply(random, vector, bounds);
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[3032] | 109 | }
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| 110 | }
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| 111 | }
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