#region License Information /* HeuristicLab * Copyright (C) 2002-2010 Heuristic and Evolutionary Algorithms Laboratory (HEAL) * * This file is part of HeuristicLab. * * HeuristicLab is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * HeuristicLab is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with HeuristicLab. If not, see . */ #endregion using System; using System.Collections.Generic; using System.Linq; using System.Text; using HeuristicLab.Common; using HeuristicLab.Core; using HeuristicLab.Data; using HeuristicLab.Parameters; namespace HeuristicLab.Problems.DataAnalysis.Evaluators { public class OnlineMeanAbsolutePercentageErrorEvaluator : IOnlineEvaluator { private double sre; private int n; public double MeanAbsolutePercentageError { get { if (n < 1) throw new InvalidOperationException("No elements"); else return sre / n; } } public OnlineMeanAbsolutePercentageErrorEvaluator() { Reset(); } #region IPairedEnumerableEvaluator Members public void Reset() { n = 0; sre = 0.0; } public void Add(double original, double estimated) { if (double.IsNaN(estimated) || double.IsInfinity(estimated) || double.IsNaN(original) || double.IsInfinity(original)) { throw new ArgumentException("Relative error is not defined for variables with NaN or infinity values."); } else { if (!original.IsAlmost(0.0)) { sre += Math.Abs((estimated - original) / original); n++; } } } #endregion } }