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Posted to issues@spark.apache.org by "Feynman Liang (JIRA)" <ji...@apache.org> on 2015/08/13 00:18:45 UTC

[jira] [Commented] (SPARK-9888) Update LDA User Guide

    [ https://issues.apache.org/jira/browse/SPARK-9888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14694287#comment-14694287 ] 

Feynman Liang commented on SPARK-9888:
--------------------------------------

[~mengxr] please assign to me

> Update LDA User Guide
> ---------------------
>
>                 Key: SPARK-9888
>                 URL: https://issues.apache.org/jira/browse/SPARK-9888
>             Project: Spark
>          Issue Type: Documentation
>          Components: MLlib
>            Reporter: Feynman Liang
>             Fix For: 1.5.0
>
>
> LDA has received numerous updates in 1.5, including:
>  * OnlineLDAOptimizer:
>         * Asymmetric document-topic priors
>         * Document-topic hyperparameter optimization
>  * LocalLDAModel
>         * predict
>         * logPerplexity / logLikelihood
>  * DistributedLDAModel:
>         * topDocumentsPerTopic
>         * topTopicsPerDoc
>  * Save/load
> It is important to note that OnlineLDAOptimizer=>LocalLDAModel and EMLDAOptimizer=>DistributedLDAModel now support different features. The user guide should document these differences.



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