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Timestamp:
04/02/10 16:49:20 (15 years ago)
Author:
gkronber
Message:

Moved general set of symbols and evaluator into Encodings.SymbolicExpressionTreeEncoding. #937 (Data types and operators for symbolic expression tree encoding)

Location:
trunk/sources/HeuristicLab.Problems.DataAnalysis.Regression/3.3/Symbolic
Files:
2 edited
2 copied

Legend:

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Removed

  • trunk/sources/HeuristicLab.Problems.DataAnalysis.Regression/3.3/Symbolic/ArithmeticExpressionGrammar.cs

    r3255 r3257  
    2626using System.Linq;
    2727using HeuristicLab.Core;
    28 using HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols;
    2928using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
    30 namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
     29using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.GeneralSymbols;
     30using HeuristicLab.Problems.DataAnalysis.Regression.Symbolic.Symbols;
     31namespace HeuristicLab.Problems.DataAnalysis.Regression.Symbolic {
    3132  [StorableClass]
    3233  public class ArithmeticExpressionGrammar : Item, ISymbolicExpressionGrammar {
    33 
    34     private class EmptySymbol : Symbol {
    35       public EmptySymbol() {
    36         Name = "Start";
    37       }
    38     }
    3934
    4035    public ArithmeticExpressionGrammar()
    … …  
    4338    #region ISymbolicExpressionGrammar Members
    4439    [Storable]
    45     private EmptySymbol startSymbol = new EmptySymbol();
     40    private StartSymbol startSymbol = new StartSymbol();
    4641    public Symbol StartSymbol {
    4742      get { return startSymbol; }
    … …  
    5550      new Division(),
    5651      new Constant(),
    57       new HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols.Variable()
     52      new HeuristicLab.Problems.DataAnalysis.Regression.Symbolic.Symbols.Variable()
    5853    };
    5954    [Storable]
    6055    private Dictionary<Type, Dictionary<int, IEnumerable<Symbol>>> allowedSymbols = new Dictionary<Type, Dictionary<int, IEnumerable<Symbol>>>() {
    6156      {
    62         typeof(EmptySymbol),
     57        typeof(StartSymbol),
    6358        new Dictionary<int, IEnumerable<Symbol>>()
    6459        {
    … …  
    10499    [Storable]
    105100    private Dictionary<Type, int> minLength = new Dictionary<Type, int>() {
    106       {typeof(EmptySymbol), 1},
     101      {typeof(StartSymbol), 1},
    107102      {typeof(Addition), 3},
    108103      {typeof(Subtraction), 3},
    … …  
    110105      {typeof(Division), 4},
    111106      {typeof(Constant), 1},
    112       {typeof(HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols.Variable), 1},
     107      {typeof(HeuristicLab.Problems.DataAnalysis.Regression.Symbolic.Symbols.Variable), 1},
    113108    };
    114109    public int MinimalExpressionLength(Symbol start) {
    … …  
    118113    [Storable]
    119114    private Dictionary<Type, int> maxLength = new Dictionary<Type, int>() {
    120       {typeof(EmptySymbol), int.MaxValue},
     115      {typeof(StartSymbol), int.MaxValue},
    121116      {typeof(Addition), int.MaxValue},
    122117      {typeof(Subtraction), int.MaxValue},
    123118      {typeof(Multiplication), int.MaxValue},
    124119      {typeof(Division), int.MaxValue},
    125       {typeof(HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols.Variable), 1},
     120      {typeof(HeuristicLab.Problems.DataAnalysis.Regression.Symbolic.Symbols.Variable), 1},
    126121      {typeof(Constant), 1},
    127122    };
    … …  
    132127    [Storable]
    133128    private Dictionary<Type, int> minDepth = new Dictionary<Type, int>() {
    134       {typeof(EmptySymbol), 1},
     129      {typeof(StartSymbol), 1},
    135130      {typeof(Addition), 1},
    136131      {typeof(Subtraction), 1},
    … …  
    138133      {typeof(Division), 1},
    139134      {typeof(Constant), 0},
    140       {typeof(HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols.Variable), 0}
     135      {typeof(HeuristicLab.Problems.DataAnalysis.Regression.Symbolic.Symbols.Variable), 0}
    141136    };
    142137    public int MinimalExpressionDepth(Symbol start) {
    … …  
    146141    [Storable]
    147142    private Dictionary<Type, int> subTrees = new Dictionary<Type, int>() {
    148       {typeof(EmptySymbol), 1},
     143      {typeof(StartSymbol), 1},
    149144      {typeof(Addition), 2},
    150145      {typeof(Subtraction), 2},
    151146      {typeof(Multiplication), 2},
    152147      {typeof(Division), 2},
    153       {typeof(HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols.Variable), 0},
     148      {typeof(HeuristicLab.Problems.DataAnalysis.Regression.Symbolic.Symbols.Variable), 0},
    154149      {typeof(Constant), 0},
    155150    };

  • trunk/sources/HeuristicLab.Problems.DataAnalysis.Regression/3.3/Symbolic/SimpleArithmeticExpressionEvaluator.cs

    r3255 r3257  
    2626using System.Collections.Generic;
    2727using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
    28 using HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols;
     28using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.GeneralSymbols;
     29using HeuristicLab.Problems.DataAnalysis.Regression.Symbolic.Symbols;
    2930
    30 namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
     31namespace HeuristicLab.Problems.DataAnalysis.Regression.Symbolic {
    3132  /// <summary>
    3233  /// Evaluates FunctionTrees recursively by interpretation of the function symbols in each node.
    … …  
    3637  [StorableClass]
    3738  [Item("SimpleArithmeticExpressionEvaluator", "Default evaluator for arithmetic symbolic expression trees.")]
    38   public class SimpleArithmeticExpressionEvaluator : Item {
     39  public class SimpleArithmeticExpressionEvaluator : GeneralSymbolicExpressionTreeEvaluator {
     40    private Dataset dataset;
     41    private int row;
    3942    public IEnumerable<double> EstimatedValues(SymbolicExpressionTree tree, Dataset dataset, IEnumerable<int> rows) {
     43      this.dataset = dataset;
    4044      foreach (var row in rows) {
    41         var estimatedValue = Evaluate(tree.Root.SubTrees[0], dataset, row);
     45        this.row = row;
     46        var estimatedValue = Evaluate(tree.Root.SubTrees[0]);
    4247        if (double.IsNaN(estimatedValue) || double.IsInfinity(estimatedValue)) yield return 0.0;
    4348        else yield return estimatedValue;
    … …  
    4550    }
    4651
    47     private double Evaluate(SymbolicExpressionTreeNode node, Dataset dataset, int row) {
    48       if (node.Symbol is HeuristicLab.Problems.DataAnalysis.Symbolic.Symbols.Variable) {
     52    public override double Evaluate(SymbolicExpressionTreeNode node) {
     53      if (node.Symbol is HeuristicLab.Problems.DataAnalysis.Regression.Symbolic.Symbols.Variable) {
    4954        var variableTreeNode = node as VariableTreeNode;
    5055        return dataset[row, 1 /*dataset.VariableIndex(variableTreeNode.VariableName)*/] * 1.0; //variableTreeNode.Weight;
    5156      } else if (node.Symbol is Constant) {
    5257        return ((ConstantTreeNode)node).Value;
    53       } else if (node.Symbol is Addition) {
    54         return Evaluate(node.SubTrees[0], dataset, row) + Evaluate(node.SubTrees[1], dataset, row);
    55       } else if (node.Symbol is Subtraction) {
    56         return Evaluate(node.SubTrees[0], dataset, row) - Evaluate(node.SubTrees[1], dataset, row);
    57       } else if (node.Symbol is Multiplication) {
    58         return Evaluate(node.SubTrees[0], dataset, row) * Evaluate(node.SubTrees[1], dataset, row);
    59       } else if (node.Symbol is Division) {
    60         return Evaluate(node.SubTrees[0], dataset, row) / Evaluate(node.SubTrees[1], dataset, row);
    6158      } else {
    62         throw new NotSupportedException("Tree contains unknown symbol: " + node.Symbol.Name);
     59        return base.Evaluate(node);
    6360      }
    6461    }

  • trunk/sources/HeuristicLab.Problems.DataAnalysis.Regression/3.3/Symbolic/SymbolicRegressionMeanSquaredErrorEvaluator.cs

    r3253 r3257  
    3434using HeuristicLab.Problems.DataAnalysis;
    3535using HeuristicLab.Operators;
    36 using HeuristicLab.Problems.DataAnalysis.Symbolic;
    3736using HeuristicLab.Problems.DataAnalysis.Evaluators;
    3837

  • trunk/sources/HeuristicLab.Problems.DataAnalysis.Regression/3.3/Symbolic/SymbolicRegressionProblem.cs

    r3253 r3257  
    3333using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
    3434using HeuristicLab.Problems.DataAnalysis.Regression;
    35 using HeuristicLab.Problems.DataAnalysis.Symbolic;
    3635
    3736namespace HeuristicLab.Problems.DataAnalysis.Regression.Symbolic {
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