source: branches/GP.Symbols (TimeLag, Diff, Integral)/HeuristicLab.Problems.DataAnalysis/3.3/Symbolic/FullFunctionalExpressionGrammar.cs @ 5051

Last change on this file since 5051 was 5051, checked in by mkommend, 11 years ago

Added new symbols for GP (ticket #1256).

File size: 4.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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.Collections.Generic;
23using HeuristicLab.Common;
24using HeuristicLab.Core;
25using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
26using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Symbols;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28using HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols;
29namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
30  [StorableClass]
31  [Item("FullFunctionalExpressionGrammar", "Represents a grammar for functional expressions using all available functions.")]
32  public class FullFunctionalExpressionGrammar : DefaultSymbolicExpressionGrammar {
33    [StorableConstructor]
34    protected FullFunctionalExpressionGrammar(bool deserializing) : base(deserializing) { }
35    protected FullFunctionalExpressionGrammar(FullFunctionalExpressionGrammar original, Cloner cloner) : base(original, cloner) { }
36    public FullFunctionalExpressionGrammar()
37      : base() {
38      Initialize();
39    }
40
41    public override IDeepCloneable Clone(Cloner cloner) {
42      return new FullFunctionalExpressionGrammar(this, cloner);
43    }
44
45    private void Initialize() {
46      var add = new Addition();
47      var sub = new Subtraction();
48      var mul = new Multiplication();
49      var div = new Division();
50      var mean = new Average();
51      var sin = new Sine();
52      var cos = new Cosine();
53      var tan = new Tangent();
54      var log = new Logarithm();
55      var exp = new Exponential();
56      var @if = new IfThenElse();
57      var gt = new GreaterThan();
58      var lt = new LessThan();
59      var and = new And();
60      var or = new Or();
61      var not = new Not();
62      var timeLag = new TimeLag();
63      timeLag.InitialFrequency = 0.0;
64      var integral = new Integral();
65      integral.InitialFrequency = 0.0;
66      var derivativ = new Derivative();
67      derivativ.InitialFrequency = 0.0;
68
69      var constant = new Constant();
70      constant.MinValue = -20;
71      constant.MaxValue = 20;
72      var variableSymbol = new HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols.Variable();
73      var laggedVariable = new LaggedVariable();
74      laggedVariable.InitialFrequency = 0.0;
75
76      var allSymbols = new List<Symbol>() { add, sub, mul, div, mean, sin, cos, tan, log, exp, @if, gt, lt, and, or, not, timeLag, integral, derivativ, constant, variableSymbol, laggedVariable };
77      var unaryFunctionSymbols = new List<Symbol>() { sin, cos, tan, log, exp, not, timeLag, integral, derivativ };
78      var binaryFunctionSymbols = new List<Symbol>() { gt, lt };
79      var functionSymbols = new List<Symbol>() { add, sub, mul, div, mean, and, or };
80      var terminalSymbols = new List<Symbol>() { variableSymbol, constant, laggedVariable };
81
82      foreach (var symb in allSymbols)
83        AddSymbol(symb);
84
85      foreach (var funSymb in functionSymbols) {
86        SetMinSubtreeCount(funSymb, 1);
87        SetMaxSubtreeCount(funSymb, 3);
88      }
89      foreach (var funSymb in unaryFunctionSymbols) {
90        SetMinSubtreeCount(funSymb, 1);
91        SetMaxSubtreeCount(funSymb, 1);
92      }
93      foreach (var funSymb in binaryFunctionSymbols) {
94        SetMinSubtreeCount(funSymb, 2);
95        SetMaxSubtreeCount(funSymb, 2);
96      }
97
98      foreach (var terminalSymbol in terminalSymbols) {
99        SetMinSubtreeCount(terminalSymbol, 0);
100        SetMaxSubtreeCount(terminalSymbol, 0);
101      }
102
103      SetMinSubtreeCount(@if, 3);
104      SetMaxSubtreeCount(@if, 3);
105
106
107      // allow each symbol as child of the start symbol
108      foreach (var symb in allSymbols) {
109        SetAllowedChild(StartSymbol, symb, 0);
110      }
111
112      // allow each symbol as child of every other symbol (except for terminals that have maxSubtreeCount == 0)
113      foreach (var parent in allSymbols) {
114        for (int i = 0; i < GetMaxSubtreeCount(parent); i++)
115          foreach (var child in allSymbols) {
116            SetAllowedChild(parent, child, i);
117          }
118      }
119    }
120  }
121}
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