Changeset 15532 for trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/TSNE/Distances/CosineDistance.cs
- Timestamp:
- 12/18/17 14:12:18 (7 years ago)
- Location:
- trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4
- Files:
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- 2 edited
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trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4
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/branches/Weighted TSNE/3.4 merged eligible /stable/HeuristicLab.Algorithms.DataAnalysis/3.4 merged eligible /branches/1721-RandomForestPersistence/HeuristicLab.Algorithms.DataAnalysis/3.4 10321-10322 /branches/Async/HeuristicLab.Algorithms.DataAnalysis/3.4 13329-15286 /branches/Benchmarking/sources/HeuristicLab.Algorithms.DataAnalysis/3.4 6917-7005 /branches/ClassificationModelComparison/HeuristicLab.Algorithms.DataAnalysis/3.4 9070-13099 /branches/CloningRefactoring/HeuristicLab.Algorithms.DataAnalysis/3.4 4656-4721 /branches/DataAnalysis Refactoring/HeuristicLab.Algorithms.DataAnalysis/3.4 5471-5808 /branches/DataAnalysis SolutionEnsembles/HeuristicLab.Algorithms.DataAnalysis/3.4 5815-6180 /branches/DataAnalysis/HeuristicLab.Algorithms.DataAnalysis/3.4 4458-4459,4462,4464 /branches/DataPreprocessing/HeuristicLab.Algorithms.DataAnalysis/3.4 10085-11101 /branches/GP.Grammar.Editor/HeuristicLab.Algorithms.DataAnalysis/3.4 6284-6795 /branches/GP.Symbols (TimeLag, Diff, Integral)/HeuristicLab.Algorithms.DataAnalysis/3.4 5060 /branches/HeuristicLab.DatasetRefactor/sources/HeuristicLab.Algorithms.DataAnalysis/3.4 11570-12508 /branches/HeuristicLab.Problems.Orienteering/HeuristicLab.Algorithms.DataAnalysis/3.4 11130-12721 /branches/HeuristicLab.RegressionSolutionGradientView/HeuristicLab.Algorithms.DataAnalysis/3.4 13819-14091 /branches/HeuristicLab.TimeSeries/HeuristicLab.Algorithms.DataAnalysis/3.4 8116-8789 /branches/LogResidualEvaluator/HeuristicLab.Algorithms.DataAnalysis/3.4 10202-10483 /branches/NET40/sources/HeuristicLab.Algorithms.DataAnalysis/3.4 5138-5162 /branches/ParallelEngine/HeuristicLab.Algorithms.DataAnalysis/3.4 5175-5192 /branches/ProblemInstancesRegressionAndClassification/HeuristicLab.Algorithms.DataAnalysis/3.4 7773-7810 /branches/QAPAlgorithms/HeuristicLab.Algorithms.DataAnalysis/3.4 6350-6627 /branches/Restructure trunk solution/HeuristicLab.Algorithms.DataAnalysis/3.4 6828 /branches/SpectralKernelForGaussianProcesses/HeuristicLab.Algorithms.DataAnalysis/3.4 10204-10479 /branches/SuccessProgressAnalysis/HeuristicLab.Algorithms.DataAnalysis/3.4 5370-5682 /branches/Trunk/HeuristicLab.Algorithms.DataAnalysis/3.4 6829-6865 /branches/VNS/HeuristicLab.Algorithms.DataAnalysis/3.4 5594-5752 /branches/histogram/HeuristicLab.Algorithms.DataAnalysis/3.4 5959-6341 /branches/symbreg-factors-2650/HeuristicLab.Algorithms.DataAnalysis/3.4 14232-14825
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trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/TSNE/Distances/CosineDistance.cs
r15234 r15532 22 22 using System; 23 23 using System.Collections.Generic; 24 using System.Linq;25 24 using HeuristicLab.Common; 26 25 using HeuristicLab.Core; … … 28 27 29 28 namespace HeuristicLab.Algorithms.DataAnalysis { 30 31 29 /// <summary> 32 30 /// The angular distance as defined as a normalized distance measure dependent on the angle between two vectors. … … 35 33 [Item("CosineDistance", "The angular distance as defined as a normalized distance measure dependent on the angle between two vectors.")] 36 34 public class CosineDistance : DistanceBase<IEnumerable<double>> { 37 38 35 #region HLConstructors & Cloning 39 36 [StorableConstructor] … … 48 45 49 46 #region statics 50 public static double GetDistance(IReadOnlyList<double> point1, IReadOnlyList<double> point2) { 51 if (point1.Count != point2.Count) throw new ArgumentException("Cosine distance not defined on vectors of different length"); 52 var innerprod = 0.0; 53 var length1 = 0.0; 54 var length2 = 0.0; 55 56 for (var i = 0; i < point1.Count; i++) { 57 double d1 = point1[i], d2 = point2[i]; 58 innerprod += d1 * d2; 59 length1 += d1 * d1; 60 length2 += d2 * d2; 47 public static double GetDistance(IEnumerable<double> point1, IEnumerable<double> point2) { 48 using (IEnumerator<double> p1Enum = point1.GetEnumerator(), p2Enum = point2.GetEnumerator()) { 49 var innerprod = 0.0; 50 var length1 = 0.0; 51 var length2 = 0.0; 52 while (p1Enum.MoveNext() & p2Enum.MoveNext()) { 53 double d1 = p1Enum.Current, d2 = p2Enum.Current; 54 innerprod += d1 * d2; 55 length1 += d1 * d1; 56 length2 += d2 * d2; 57 } 58 var divisor = Math.Sqrt(length1 * length2); 59 if (divisor.IsAlmost(0)) throw new ArgumentException("Cosine distance is not defined on vectors of length 0"); 60 if (p1Enum.MoveNext() || p2Enum.MoveNext()) throw new ArgumentException("Cosine distance not defined on vectors of different length"); 61 return 1 - innerprod / divisor; 61 62 } 62 var l = Math.Sqrt(length1 * length2);63 if (l.IsAlmost(0)) throw new ArgumentException("Cosine distance is not defined on vectors of length 0");64 return 1 - innerprod / l;65 63 } 66 64 #endregion 67 65 public override double Get(IEnumerable<double> a, IEnumerable<double> b) { 68 return GetDistance(a .ToArray(), b.ToArray());66 return GetDistance(a, b); 69 67 } 70 68 }
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