source: branches/3040_VectorBasedGP/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Symbols/WindowedSymbolTreeNode.cs @ 17573

Last change on this file since 17573 was 17573, checked in by pfleck, 2 years ago

#3040 Added first draft for WindowedSymbol.

File size: 3.3 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
26using HEAL.Attic;
27using HeuristicLab.Random;
28
29namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
30  [StorableType("E79432BB-414D-4535-8751-D0139AF048E1")]
31  public class WindowedSymbolTreeNode : SymbolicExpressionTreeNode, IWindowedSymbolTreeNode {
32    public new WindowedSymbol Symbol {
33      get { return (WindowedSymbol)base.Symbol; }
34    }
35    [Storable]
36    private double offset;
37    public double Offset {
38      get { return offset; }
39      set { offset = Math.Min(Math.Max(value, 0.0), 1.0); }     
40    }
41    [Storable]
42    private double length;
43    public double Length {
44      get { return length; }
45      set { length = Math.Min(Math.Max(value, 0.0), 1.0); }
46    }
47
48    [StorableConstructor]
49    protected WindowedSymbolTreeNode(StorableConstructorFlag _) : base(_) { }
50    protected WindowedSymbolTreeNode(WindowedSymbolTreeNode original, Cloner cloner)
51      : base(original, cloner) {
52      offset = original.offset;
53      length = original.length;
54    }
55    public override IDeepCloneable Clone(Cloner cloner) {
56      return new WindowedSymbolTreeNode(this, cloner);
57    }
58
59    public WindowedSymbolTreeNode(WindowedSymbol windowedSymbol) : base(windowedSymbol) {
60      if (!windowedSymbol.EnableWindowing) {
61        Offset = 0.0;
62        Length = 1.0;
63      }
64    }
65
66    public override bool HasLocalParameters {
67      get { return Symbol.EnableWindowing; }
68    }
69
70    public override void ResetLocalParameters(IRandom random) {
71      base.ResetLocalParameters(random);
72
73      if (Symbol.EnableWindowing) {
74        Offset = NormalDistributedRandom.NextDouble(random, Symbol.OffsetMu, Symbol.OffsetSigma);
75        Length = NormalDistributedRandom.NextDouble(random, Symbol.LengthMu, Symbol.LengthSigma);
76      }
77    }
78
79    public override void ShakeLocalParameters(IRandom random, double shakingFactor) {
80      base.ShakeLocalParameters(random, shakingFactor);
81
82      if (Symbol.EnableWindowing) {
83        Offset += NormalDistributedRandom.NextDouble(random, Symbol.ManipulatorOffsetMu, Symbol.ManipulatorOffsetSigma) * shakingFactor;
84        Length += NormalDistributedRandom.NextDouble(random, Symbol.ManipulatorLengthMu, Symbol.ManipulatorLengthSigma) * shakingFactor;
85      }
86    }
87
88    public override string ToString() {
89      return Symbol.EnableWindowing
90        ? base.ToString() + $"[{Offset} : {Length}]"
91        : base.ToString();
92    }
93  }
94}
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