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https://issues.apache.org/jira/browse/MAHOUT-1935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15855307#comment-15855307
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Hudson commented on MAHOUT-1935:
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FAILURE: Integrated in Jenkins build Mahout-Quality #3416 (See
[https://builds.apache.org/job/Mahout-Quality/3416/])
MAHOUT-1935 fix double calculation of XtX closes apache/mahout#277
(rawkintrevo: rev f4631528b6d017d974ed46d191651e1f7edbe6a7)
* (edit)
math-scala/src/main/scala/org/apache/mahout/math/algorithms/regression/OrdinaryLeastSquaresModel.scala
> Inefficient use of XtX calculation in Ordinary Least Squares
> ------------------------------------------------------------
>
> Key: MAHOUT-1935
> URL: https://issues.apache.org/jira/browse/MAHOUT-1935
> Project: Mahout
> Issue Type: Improvement
> Affects Versions: 0.13.0
> Reporter: Trevor Grant
> Assignee: Trevor Grant
> Priority: Minor
> Labels: beginner
> Fix For: 0.13.0
>
>
> In line 59 of OrdinaryLeastSquaresModel we calculate and collect XtX, but
> then don't bother to use it (so it is in essence calculated twice).
> ~https://github.com/apache/zeppelin/blob/master/spark/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java~
> Not sure how that link got in there. It is unrelated.
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