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https://issues.apache.org/jira/browse/SPARK-18062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15600926#comment-15600926
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Peng Meng commented on SPARK-18062:
-----------------------------------
This relate to how to understand all-0 rawPrediction, all classes are
impossible or all classes are the same? If the later,
ProbabilisticClassificationModel.normalizeToProbabilitiesInPlace should return
a valid probability vector with the uniform distribution.
> ProbabilisticClassificationModel.normalizeToProbabilitiesInPlace should
> return probabilities when given all-0 vector
> --------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-18062
> URL: https://issues.apache.org/jira/browse/SPARK-18062
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: Joseph K. Bradley
> Priority: Trivial
>
> {{ProbabilisticClassificationModel.normalizeToProbabilitiesInPlace}} returns
> a vector of all-0 when given a rawPrediction vector of all-0. It should
> return a valid probability vector with the uniform distribution.
> Note: This will be a *behavior change* but it should be very minor and affect
> few if any users. But we should note it in release notes.
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