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https://issues.apache.org/jira/browse/MAHOUT-1757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14649829#comment-14649829
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Hudson commented on MAHOUT-1757:
--------------------------------
SUCCESS: Integrated in Mahout-Quality #3246 (See
[https://builds.apache.org/job/Mahout-Quality/3246/])
MAHOUT-1757:Small fix in spca formula, this closes Mahout#152 (smarthi: rev
7587f40cfeb36a713f7618e496aac203567c3c72)
* math-scala/src/main/scala/org/apache/mahout/math/decompositions/SSVD.scala
*
spark/src/test/scala/org/apache/mahout/math/decompositions/DistributedDecompositionsSuite.scala
* math-scala/src/main/scala/org/apache/mahout/math/decompositions/DSPCA.scala
> Small fix in spca formula
> -------------------------
>
> Key: MAHOUT-1757
> URL: https://issues.apache.org/jira/browse/MAHOUT-1757
> Project: Mahout
> Issue Type: Improvement
> Reporter: Dmitriy Lyubimov
> Assignee: Suneel Marthi
> Fix For: 0.10.2, 0.11.0
>
>
> there's small error in the spca, Y correction inside power iterations should
> really be -(s_b-xi'xi*s_b). It doesn't seem to affect much the result but
> this is a small error (~7-th-8th digit after dot) it introduces when power
> iterations are used.
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