[3253] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[17180] | 3 | * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[3253] | 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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[4722] | 22 | using HeuristicLab.Common;
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[4068] | 23 | using HeuristicLab.Core;
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[3253] | 24 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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[16565] | 25 | using HEAL.Attic;
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[3269] | 26 | using HeuristicLab.Random;
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[5532] | 27 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
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[16565] | 28 | [StorableType("247DBD04-18F2-4184-B6F5-6E283BF06FD0")]
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[18112] | 29 | public sealed class NumberTreeNode : SymbolicExpressionTreeTerminalNode, INumericTreeNode {
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| 30 | public new Number Symbol => (Number)base.Symbol;
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[3253] | 31 |
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| 32 | [Storable]
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[18112] | 33 | public double Value { get; set; }
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[3485] | 34 |
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[4722] | 35 | [StorableConstructor]
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[18112] | 36 | private NumberTreeNode(StorableConstructorFlag _) : base(_) { }
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[3485] | 37 |
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[18112] | 38 | private NumberTreeNode(NumberTreeNode original, Cloner cloner)
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[4722] | 39 | : base(original, cloner) {
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[18112] | 40 | Value = original.Value;
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[3253] | 41 | }
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| 42 |
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[18112] | 43 | private NumberTreeNode() : base() { }
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| 44 | public NumberTreeNode(Number numberSymbol) : base(numberSymbol) { }
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[3253] | 45 |
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[18112] | 46 | public override bool HasLocalParameters => true;
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| 47 |
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[3269] | 48 | public override void ResetLocalParameters(IRandom random) {
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| 49 | base.ResetLocalParameters(random);
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[3465] | 50 | var range = Symbol.MaxValue - Symbol.MinValue;
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[6180] | 51 | Value = random.NextDouble() * range + Symbol.MinValue;
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[3269] | 52 | }
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| 53 |
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[3512] | 54 | public override void ShakeLocalParameters(IRandom random, double shakingFactor) {
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| 55 | base.ShakeLocalParameters(random, shakingFactor);
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[5326] | 56 | // 50% additive & 50% multiplicative
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| 57 | if (random.NextDouble() < 0.5) {
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[18112] | 58 | var x = NormalDistributedRandom.NextDouble(random, Symbol.ManipulatorMu, Symbol.ManipulatorSigma);
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[5326] | 59 | Value = Value + x * shakingFactor;
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| 60 | } else {
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[18112] | 61 | var x = NormalDistributedRandom.NextDouble(random, 1.0, Symbol.MultiplicativeManipulatorSigma);
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[5326] | 62 | Value = Value * x;
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| 63 | }
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[3512] | 64 | }
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| 65 |
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[4722] | 66 | public override IDeepCloneable Clone(Cloner cloner) {
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[18112] | 67 | return new NumberTreeNode(this, cloner);
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[3253] | 68 | }
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[3442] | 69 |
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| 70 | public override string ToString() {
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[18112] | 71 | return $"{Value:E4}";
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[3442] | 72 | }
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[3253] | 73 | }
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| 74 | }
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