[jira] [Commented] (SPARK-25758) Deprecate BisectingKMeans compute cost

["Marco Gaido (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-25758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16653641#comment-16653641 ] 

Marco Gaido commented on SPARK-25758:
-------------------------------------

cc [~cloud_fan] [~srowen] [~holdenkarau]. This is a minor thing but might become a blocker for 2.4 if we want to deprecate it there so that we can remove it in 3.0 as planned for {{KMeans.computeCost}}.

> Deprecate BisectingKMeans compute cost
> --------------------------------------
>
>                 Key: SPARK-25758
>                 URL: https://issues.apache.org/jira/browse/SPARK-25758
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML
>    Affects Versions: 2.4.0
>            Reporter: Marco Gaido
>            Priority: Major
>
> In SPARK-23451 the method {{computeCost}} from KMeans was deprecated, as we have now a better way to evaluate a clustering algorithm (the {{ClusteringEvaluator}}). Moreover, in the deprecation, the method was targeted for removal in 3.0.
> I think we should deprecate the computeCost method on BisectingKMeans  for the same reasons.



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