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https://issues.apache.org/jira/browse/SPARK-21770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siddharth Murching updated SPARK-21770:
---------------------------------------
    Description: Given an n-element raw prediction vector of all-zeros, 
ProbabilisticClassifierModel.normalizeToProbabilitiesInPlace() should output a 
probability vector of all-equal 1/n entries  (was: Given a raw prediction 
vector of all-zeros, 
ProbabilisticClassifierModel.normalizeToProbabilitiesInPlace() should output a 
probability vector that predicts each class with equal probability (1 / 
numClasses).)

> ProbabilisticClassificationModel: Improve normalization of all-zero raw 
> predictions
> -----------------------------------------------------------------------------------
>
>                 Key: SPARK-21770
>                 URL: https://issues.apache.org/jira/browse/SPARK-21770
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML
>    Affects Versions: 2.3.0
>            Reporter: Siddharth Murching
>            Priority: Minor
>
> Given an n-element raw prediction vector of all-zeros, 
> ProbabilisticClassifierModel.normalizeToProbabilitiesInPlace() should output 
> a probability vector of all-equal 1/n entries



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