[4417] | 1 | #region License Information
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| 2 | /* HeuristicLab
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[5445] | 3 | * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[4417] | 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using HeuristicLab.Common;
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| 24 |
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| 25 | namespace HeuristicLab.Problems.DataAnalysis.Classification {
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| 26 | public class OnlineAccuracyEvaluator : IOnlineEvaluator {
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| 27 | private int n;
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| 28 | private int correctClassified; // TP + TN necessary for multi class classification
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| 29 |
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| 30 | public OnlineAccuracyEvaluator() {
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| 31 | Reset();
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| 32 | }
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| 33 |
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| 34 | public void Add(double original, double estimated) {
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| 35 | if (double.IsNaN(estimated) || double.IsInfinity(estimated) ||
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| 36 | double.IsNaN(original) || double.IsInfinity(original))
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| 37 | throw new ArgumentException("Accuracy is not defined for NaN or infinity elements");
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| 38 |
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| 39 | if (original.IsAlmost(estimated))
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| 40 | correctClassified++;
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| 41 | n++;
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| 42 | }
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| 43 |
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| 44 | public void Reset() {
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| 45 | n = 0;
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| 46 | correctClassified = 0;
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| 47 | }
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| 48 |
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| 49 | public double Accuracy {
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| 50 | get {
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| 51 | if (n < 1)
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| 52 | throw new InvalidOperationException("No elements");
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| 53 | else
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| 54 | return ((double)correctClassified) / n;
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| 55 | }
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| 56 | }
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| 57 | public double Value {
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| 58 | get { return Accuracy; }
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| 59 | }
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| 60 |
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| 61 | }
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| 62 | }
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