Changeset 8455 for trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/GaussianProcess/CovarianceLinear.cs

Timestamp:

08/09/12 09:33:23 (12 years ago)

Author:

gkronber

Message:

#1902 changed calculation of gradients for covariance functions to reduce allocations of arrays

File:

• trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/GaussianProcess/CovarianceLinear.cs (modified) (2 diffs)

trunk/sources/HeuristicLab.Algorithms.DataAnalysis/3.4/GaussianProcess/CovarianceLinear.cs

@@ -29 +29 @@
   [Item(Name = "CovarianceLinear", Description = "Linear covariance function for Gaussian processes.")]
   public class CovarianceLinear : Item, ICovarianceFunction {
-    private static readonly double[] emptyArray = new double[0];
-
     [Storable]
     private double[,] x;
@@ -89 +87 @@
     }
 
-    public double[] GetGradient(int i, int j) {
-      return emptyArray;
+    public double GetGradient(int i, int j, int k) {
+      throw new NotSupportedException("CovarianceLinear does not have hyperparameters.");
     }