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Last change
on this file since 2879 was
2844,
checked in by gkronber, 15 years ago
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Added a check to SimpleStableCorrelationCoefficientEvaluator so that a r2 of 0.0 is returned instead of NaN (in case of division by zero). Also removed unnecessary try {} catch block in SimplePearsonCorrelationCoefficientEvaluator. #881
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File size:
888 bytes
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| 1 | using System;
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| 2 | using System.Collections.Generic;
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| 3 | using System.Linq;
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| 4 | using System.Text;
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| 5 | using HeuristicLab.Core;
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| 6 | using HeuristicLab.Data;
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| 7 | using HeuristicLab.DataAnalysis;
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| 8 |
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| 9 | namespace HeuristicLab.Modeling {
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| 10 | public class SimplePearsonCorrelationCoefficientEvaluator : SimpleEvaluatorBase {
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| 11 |
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| 12 | public override string OutputVariableName {
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| 13 | get {
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| 14 | return "R2";
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| 15 | }
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| 16 | }
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| 17 |
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| 18 | public override double Evaluate(double[,] values) {
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| 19 | return Calculate(values);
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| 20 | }
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| 21 |
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| 22 | public static double Calculate(double[,] values) {
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| 23 | double[] estimated = Matrix<double>.GetColumn(values, ESTIMATION_INDEX);
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| 24 | double[] original = Matrix<double>.GetColumn(values, ORIGINAL_INDEX);
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| 25 | double r = alglib.correlation.pearsoncorrelation(
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| 26 | ref estimated,
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| 27 | ref original,
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| 28 | values.GetLength(0));
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| 29 | return r * r;
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| 30 | }
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| 31 | }
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| 32 | }
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