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From "Joseph K. Bradley (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-9788) LDA docConcentration, gammaShape 1.5 binary incompatibility fixes
Date Mon, 10 Aug 2015 19:19:46 GMT

     [ https://issues.apache.org/jira/browse/SPARK-9788?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Joseph K. Bradley updated SPARK-9788:
-------------------------------------
    Assignee: Feynman Liang

> LDA docConcentration, gammaShape 1.5 binary incompatibility fixes
> -----------------------------------------------------------------
>
>                 Key: SPARK-9788
>                 URL: https://issues.apache.org/jira/browse/SPARK-9788
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>            Reporter: Joseph K. Bradley
>            Assignee: Feynman Liang
>
> From [SPARK-9658]:
> 1. LDA.docConcentration
> It will be nice to keep the old APIs unchanged.  Proposal:
> * Add “asymmetricDocConcentration” and revert docConcentration changes.
> * If the (internal) doc concentration vector is a single value, “getDocConcentration"
returns it.  If it is a constant vector, getDocConcentration returns the first item, and fails
otherwise.
> 2. LDAModel.gammaShape
> This should be given a default value.



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