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Posted to commits@commons.apache.org by er...@apache.org on 2015/08/13 23:33:23 UTC
[2/2] [math] MATH-1255
MATH-1255
Wrong usage of "Gaussian" function.
Project: http://git-wip-us.apache.org/repos/asf/commons-math/repo
Commit: http://git-wip-us.apache.org/repos/asf/commons-math/commit/4f73871c
Tree: http://git-wip-us.apache.org/repos/asf/commons-math/tree/4f73871c
Diff: http://git-wip-us.apache.org/repos/asf/commons-math/diff/4f73871c
Branch: refs/heads/master
Commit: 4f73871cf40b6dd05c8872d39246c67f798ed915
Parents: 63bc0db
Author: Gilles <er...@apache.org>
Authored: Thu Aug 13 23:32:37 2015 +0200
Committer: Gilles <er...@apache.org>
Committed: Thu Aug 13 23:32:37 2015 +0200
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src/changes/changes.xml | 3 +++
.../commons/math4/ml/neuralnet/sofm/KohonenUpdateAction.java | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
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http://git-wip-us.apache.org/repos/asf/commons-math/blob/4f73871c/src/changes/changes.xml
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diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index 1849688..f1076db 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -54,6 +54,9 @@ If the output is not quite correct, check for invisible trailing spaces!
</release>
<release version="4.0" date="XXXX-XX-XX" description="">
+ <action dev="erans" type="fix" issue="MATH-1255">
+ Wrong neighbourhood size in class "KohonenUpdateAction" (package "o.a.c.m.ml.neuralnet.sofm").
+ </action>
<action dev="psteitz" type="fix" issue="MATH-1252" due-to="John Bay"> <!-- backported to 3.6 -->
ResizableDoubleArray constructor does not work with double array of size 1.
</action>
http://git-wip-us.apache.org/repos/asf/commons-math/blob/4f73871c/src/main/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenUpdateAction.java
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diff --git a/src/main/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenUpdateAction.java b/src/main/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenUpdateAction.java
index 1b4b54e..87e1bbc 100644
--- a/src/main/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenUpdateAction.java
+++ b/src/main/java/org/apache/commons/math4/ml/neuralnet/sofm/KohonenUpdateAction.java
@@ -107,7 +107,7 @@ public class KohonenUpdateAction implements UpdateAction {
final Gaussian neighbourhoodDecay
= new Gaussian(currentLearning,
0,
- 1d / currentNeighbourhood);
+ currentNeighbourhood);
if (currentNeighbourhood > 0) {
// Initial set of neurons only contains the winning neuron.