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Posted to issues@spark.apache.org by "Feynman Liang (JIRA)" <ji...@apache.org> on 2015/08/12 22:16:45 UTC

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

Feynman Liang created SPARK-9888:
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             Summary: 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

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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