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https://issues.apache.org/jira/browse/SPARK-6793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14632598#comment-14632598
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Feynman Liang commented on SPARK-6793:
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I'm working on this.
> Implement perplexity for LDA
> ----------------------------
>
> Key: SPARK-6793
> URL: https://issues.apache.org/jira/browse/SPARK-6793
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Affects Versions: 1.3.0
> Reporter: Joseph K. Bradley
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> LDA should be able to compute perplexity. This JIRA is for computing it on
> the training dataset. See the linked JIRA for computing it on a new corpus:
> [SPARK-5567]
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