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https://issues.apache.org/jira/browse/MAHOUT-1086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13473820#comment-13473820
]
Hudson commented on MAHOUT-1086:
--------------------------------
Integrated in Mahout-Quality #1695 (See
[https://builds.apache.org/job/Mahout-Quality/1695/])
MAHOUT-1086 - Deal with round-off errors in computing L_2 distances. Add
special case to get higher accuracy when vector difference is small, merge
AbstractVectorTest and AbstractTestVector, fix like() bug in Centroid and
WeightedVector. (Revision 1396888)
Result = SUCCESS
tdunning :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1396888
Files :
*
/mahout/trunk/core/src/test/java/org/apache/mahout/clustering/meanshift/TestMeanShift.java
* /mahout/trunk/math/src/main/java/org/apache/mahout/math/AbstractVector.java
* /mahout/trunk/math/src/main/java/org/apache/mahout/math/Centroid.java
* /mahout/trunk/math/src/main/java/org/apache/mahout/math/DelegatingVector.java
* /mahout/trunk/math/src/main/java/org/apache/mahout/math/DenseVector.java
*
/mahout/trunk/math/src/main/java/org/apache/mahout/math/LengthCachingVector.java
*
/mahout/trunk/math/src/main/java/org/apache/mahout/math/RandomAccessSparseVector.java
*
/mahout/trunk/math/src/main/java/org/apache/mahout/math/SequentialAccessSparseVector.java
* /mahout/trunk/math/src/main/java/org/apache/mahout/math/WeightedVector.java
*
/mahout/trunk/math/src/test/java/org/apache/mahout/math/AbstractTestVector.java
*
/mahout/trunk/math/src/test/java/org/apache/mahout/math/AbstractVectorTest.java
* /mahout/trunk/math/src/test/java/org/apache/mahout/math/CentroidTest.java
* /mahout/trunk/math/src/test/java/org/apache/mahout/math/TestDenseVector.java
*
/mahout/trunk/math/src/test/java/org/apache/mahout/math/TestRandomAccessSparseVector.java
*
/mahout/trunk/math/src/test/java/org/apache/mahout/math/TestSequentialAccessSparseVector.java
* /mahout/trunk/math/src/test/java/org/apache/mahout/math/VectorTest.java
*
/mahout/trunk/math/src/test/java/org/apache/mahout/math/WeightedVectorTest.java
> Mean Shift Test Now Produces 4 Clusters
> ---------------------------------------
>
> Key: MAHOUT-1086
> URL: https://issues.apache.org/jira/browse/MAHOUT-1086
> Project: Mahout
> Issue Type: Bug
> Components: Clustering
> Affects Versions: 0.7
> Reporter: Jeff Eastman
> Fix For: 0.8
>
> Attachments:
> 0001-MAHOUT-1086-Deal-with-round-off-errors-in-computing-.patch,
> 0001-MAHOUT-1086-Deal-with-round-off-errors-in-computing-.patch
>
>
> Something changed in Mahout around 9/6/12 that caused
> TestMeanShift.testCanopyEuclideanMRJobNoClustering to return 4 clusters
> rather than 3. All of the other tests using the same data still return 3
> clusters. No changes were made to any of the MeanShiftCanopy classes other
> than 1 formatting change to the driver so I'm at a loss to the cause.
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