Last change
on this file since 3155 was
2357,
checked in by gkronber, 15 years ago
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Fixed #740 (SimpleEvaluators in HL.GP.StructId and HL.SVM are not compatible with evaluators in HL.Modeling).
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File size:
1.3 KB
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Rev | Line | |
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[1810] | 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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[1869] | 9 | namespace HeuristicLab.Modeling {
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[1888] | 10 | public class SimpleMSEEvaluator : SimpleEvaluatorBase {
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[1810] | 11 |
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[1888] | 12 | public override string OutputVariableName {
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| 13 | get {
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| 14 | return "MSE";
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| 15 | }
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[1810] | 16 | }
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[1888] | 17 | public override double Evaluate(double[,] values) {
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[2136] | 18 | try {
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| 19 | return Calculate(values);
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| 20 | }
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| 21 | catch (ArgumentException) {
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| 22 | return double.PositiveInfinity;
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| 23 | }
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[1888] | 24 | }
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[1810] | 25 |
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[1888] | 26 | public static double Calculate(double[,] values) {
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[1810] | 27 | double sse = 0;
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[1869] | 28 | double cnt = 0;
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[1888] | 29 | for (int i = 0; i < values.GetLength(0); i++) {
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[2357] | 30 | double estimated = values[i, ESTIMATION_INDEX];
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| 31 | double target = values[i, ORIGINAL_INDEX];
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[1810] | 32 | if (!double.IsNaN(estimated) && !double.IsInfinity(estimated) &&
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| 33 | !double.IsNaN(target) && !double.IsInfinity(target)) {
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[1814] | 34 | double error = estimated - target;
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[1810] | 35 | sse += error * error;
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| 36 | cnt++;
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| 37 | }
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| 38 | }
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[2136] | 39 | if (cnt > 0) {
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| 40 | double mse = sse / cnt;
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| 41 | return mse;
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| 42 | } else {
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| 43 | throw new ArgumentException("Mean squared errors is not defined for input vectors of NaN or Inf");
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| 44 | }
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[1810] | 45 | }
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| 46 | }
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| 47 | }
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