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From "Xiangrui Meng (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-5021) GaussianMixtureEM should be faster for SparseVector input
Date Tue, 10 Feb 2015 22:07:11 GMT

     [ https://issues.apache.org/jira/browse/SPARK-5021?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xiangrui Meng resolved SPARK-5021.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 1.3.0

Issue resolved by pull request 4459
[https://github.com/apache/spark/pull/4459]

> GaussianMixtureEM should be faster for SparseVector input
> ---------------------------------------------------------
>
>                 Key: SPARK-5021
>                 URL: https://issues.apache.org/jira/browse/SPARK-5021
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>    Affects Versions: 1.3.0
>            Reporter: Joseph K. Bradley
>            Assignee: Manoj Kumar
>             Fix For: 1.3.0
>
>
> GaussianMixtureEM currently converts everything to dense vectors.  It would be nice if
it were faster for SparseVectors (running in time linear in the number of non-zero values).
> However, this may not be too important since clustering should rarely be done in high
dimensions.



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