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https://issues.apache.org/jira/browse/SPARK-20423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15978149#comment-15978149
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Apache Spark commented on SPARK-20423:
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User 'WeichenXu123' has created a pull request for this issue:
https://github.com/apache/spark/pull/17706
> fix MLOR coeffs centering when reg == 0
> ---------------------------------------
>
> Key: SPARK-20423
> URL: https://issues.apache.org/jira/browse/SPARK-20423
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 2.0.0, 2.1.0
> Reporter: Weichen Xu
> Priority: Minor
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> When reg == 0, MLOR has multiple solutions and we need to centralize the
> coeffs to get identical result.
> BUT current implementation centralize the coefficientMatrix by the global
> coeffs means.
> In fact the coefficientMatrix should be centralized on each feature index
> itself.
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