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https://issues.apache.org/jira/browse/SPARK-19057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15794968#comment-15794968
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Apache Spark commented on SPARK-19057:
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User 'zhengruifeng' has created a pull request for this issue:
https://github.com/apache/spark/pull/16457
> Instances' weight must be non-negative
> --------------------------------------
>
> Key: SPARK-19057
> URL: https://issues.apache.org/jira/browse/SPARK-19057
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: zhengruifeng
> Priority: Trivial
>
> It looks like that negative-weighted instances make no sense and can cause
> divergence in ml algs.
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