1 | using System.Linq;
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2 | using HeuristicLab.Analysis;
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3 | using HeuristicLab.Core;
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4 | using HeuristicLab.Data;
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5 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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6 | using HeuristicLab.Parameters;
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7 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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8 |
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9 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic.Analyzers {
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10 | [Item("SymbolicDataAnalysisPhenotypicDiversityAnalyzer", "An analyzer which calculates diversity based on the phenotypic similarity between trees")]
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11 | [StorableClass]
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12 | public class SymbolicDataAnalysisPhenotypicDiversityAnalyzer : SingleObjectivePopulationDiversityAnalyzer {
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13 | private const string SymbolicExpressionTreeParameterName = "SymbolicExpressionTree";
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14 | private const string EvaluatedValuesParameterName = "EstimatedValues";
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15 | private const string SymbolicDataAnalysisTreeInterpreterParameterName = "SymbolicExpressionTreeInterpreter";
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16 | private const string ProblemDataParameterName = "ProblemData";
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17 | private const string EstimationLimitsParameterName = "EstimationLimits";
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18 |
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19 | public IScopeTreeLookupParameter<ISymbolicExpressionTree> SymbolicExpressionTreeParameter {
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20 | get { return (IScopeTreeLookupParameter<ISymbolicExpressionTree>)Parameters[SymbolicExpressionTreeParameterName]; }
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21 | }
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22 |
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23 | private IScopeTreeLookupParameter<DoubleArray> EvaluatedValuesParameter {
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24 | get { return (IScopeTreeLookupParameter<DoubleArray>)Parameters[EvaluatedValuesParameterName]; }
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25 | }
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26 |
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27 | public ILookupParameter<ISymbolicDataAnalysisExpressionTreeInterpreter> SymbolicDataAnalysisTreeInterpreterParameter {
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28 | get { return (ILookupParameter<ISymbolicDataAnalysisExpressionTreeInterpreter>)Parameters[SymbolicDataAnalysisTreeInterpreterParameterName]; }
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29 | }
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30 | public IValueLookupParameter<IDataAnalysisProblemData> ProblemDataParameter {
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31 | get { return (IValueLookupParameter<IDataAnalysisProblemData>)Parameters[ProblemDataParameterName]; }
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32 | }
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33 |
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34 | public IValueLookupParameter<DoubleLimit> EstimationLimitsParameter {
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35 | get { return (IValueLookupParameter<DoubleLimit>)Parameters[EstimationLimitsParameterName]; }
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36 | }
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37 |
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38 | public SymbolicDataAnalysisPhenotypicDiversityAnalyzer() {
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39 | SimilarityCalculator = new PhenotypicSimilarityCalculator { SolutionVariableName = "SymbolicExpressionTree" };
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40 |
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41 | Parameters.Add(new ScopeTreeLookupParameter<ISymbolicExpressionTree>(SymbolicExpressionTreeParameterName, "The symbolic expression trees."));
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42 | Parameters.Add(new ScopeTreeLookupParameter<DoubleArray>(EvaluatedValuesParameterName, "Intermediate estimated values to be saved in the scopes."));
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43 | Parameters.Add(new LookupParameter<ISymbolicDataAnalysisExpressionTreeInterpreter>(SymbolicDataAnalysisTreeInterpreterParameterName, "The interpreter that should be used to calculate the output values of the symbolic data analysis tree."));
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44 | Parameters.Add(new ValueLookupParameter<IDataAnalysisProblemData>(ProblemDataParameterName, "The problem data on which the symbolic data analysis solution should be evaluated."));
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45 | Parameters.Add(new ValueLookupParameter<DoubleLimit>(EstimationLimitsParameterName, "The upper and lower limit that should be used as cut off value for the output values of symbolic data analysis trees."));
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46 | }
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47 |
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48 | public override IOperation Apply() {
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49 | var trees = SymbolicExpressionTreeParameter.ActualValue;
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50 | var interpreter = SymbolicDataAnalysisTreeInterpreterParameter.ActualValue;
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51 | var ds = ProblemDataParameter.ActualValue.Dataset;
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52 | var rows = ProblemDataParameter.ActualValue.TrainingIndices;
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53 |
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54 | var evaluatedValues = new ItemArray<DoubleArray>(trees.Select(t => new DoubleArray(interpreter.GetSymbolicExpressionTreeValues(t, ds, rows).ToArray())));
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55 |
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56 | EvaluatedValuesParameter.ActualValue = evaluatedValues;
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57 |
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58 | return base.Apply();
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59 | }
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60 | }
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61 | }
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