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https://issues.apache.org/jira/browse/SPARK-21257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon updated SPARK-21257:
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Labels: bulk-closed (was: )
> LDA : create an Evaluator to enable cross validation
> ----------------------------------------------------
>
> Key: SPARK-21257
> URL: https://issues.apache.org/jira/browse/SPARK-21257
> Project: Spark
> Issue Type: New Feature
> Components: ML
> Affects Versions: 2.1.1
> Reporter: Mathieu DESPRIEE
> Priority: Major
> Labels: bulk-closed
>
> I suggest the creation of an LDAEvaluator to use with CrossValidator, using
> logPerplexity as a metric for evaluation.
> Unfortunately, the computation of perplexity needs to access some internal
> data of the model, and the current implementation of CrossValidator does not
> pass the model being evaluated to the Evaluator.
> A way could be to change the Evaluator.evaluate() method to pass the model
> along with the dataset.
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