Changeset 13784 for trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/GaussianProcess/CovarianceFunctions/CovarianceMaternIso.cs
 Timestamp:
 04/22/16 13:47:35 (5 years ago)
 File:

 1 edited
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trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/GaussianProcess/CovarianceFunctions/CovarianceMaternIso.cs
r13721 r13784 155 155 } 156 156 157 158 private static IEnumerable<double> GetGradient(double[,] x, int i, int j, int d, double scale, double inverseLength, int[] columnIndices, 157 private static IList<double> GetGradient(double[,] x, int i, int j, int d, double scale, double inverseLength, int[] columnIndices, 159 158 bool fixedInverseLength, bool fixedScale) { 160 159 double dist = i == j … … 162 161 : Math.Sqrt(Util.SqrDist(x, i, j, columnIndices, Math.Sqrt(d) * inverseLength)); 163 162 164 if (!fixedInverseLength) yield return scale * dm(d, dist); 165 if (!fixedScale) yield return 2 * scale * m(d, dist); 163 var g = new List<double>(2); 164 if (!fixedInverseLength) g.Add(scale * dm(d, dist)); 165 if (!fixedScale) g.Add(2 * scale * m(d, dist)); 166 return g; 166 167 } 167 168 }
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