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Posted to issues@spark.apache.org by "Manoj Kumar (JIRA)" <ji...@apache.org> on 2015/01/20 20:50:35 UTC
[jira] [Commented] (SPARK-5021) GaussianMixtureEM should be faster
for SparseVector input
[ https://issues.apache.org/jira/browse/SPARK-5021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14284299#comment-14284299 ]
Manoj Kumar commented on SPARK-5021:
------------------------------------
[~josephkb] Can you please assign this to me? I can work on this in the coming week.
> 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: 1.2.0
> Reporter: Joseph K. Bradley
>
> 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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