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https://issues.apache.org/jira/browse/MAHOUT-1935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Trevor Grant resolved MAHOUT-1935.
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Resolution: Fixed
> 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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