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https://issues.apache.org/jira/browse/SPARK-7222?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14518769#comment-14518769
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Apache Spark commented on SPARK-7222:
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User 'dbtsai' has created a pull request for this issue:
https://github.com/apache/spark/pull/5767
> Added mathematical derivation in comment to LinearRegression with ElasticNet
> ----------------------------------------------------------------------------
>
> Key: SPARK-7222
> URL: https://issues.apache.org/jira/browse/SPARK-7222
> Project: Spark
> Issue Type: Documentation
> Components: ML
> Reporter: DB Tsai
>
> Added detailed mathematical derivation of how scaling and
> LeastSquaresAggregator work. Also refactored the code. TODO: Add test that
> fail the test when the correction terms are not correctly computed.
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