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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/01/19 22:56:39 UTC

[jira] [Commented] (SPARK-12869) Optimize conversion from BlockMatrix to IndexedRowMatrix

    [ https://issues.apache.org/jira/browse/SPARK-12869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15107534#comment-15107534 ] 

Apache Spark commented on SPARK-12869:
--------------------------------------

User 'Fokko' has created a pull request for this issue:
https://github.com/apache/spark/pull/10839

> Optimize conversion from BlockMatrix to IndexedRowMatrix
> --------------------------------------------------------
>
>                 Key: SPARK-12869
>                 URL: https://issues.apache.org/jira/browse/SPARK-12869
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>            Reporter: Fokko Driesprong
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> In the current implementation of the BlockMatrix, the conversion to the IndexedRowMatrix is done by converting it to a CoordinateMatrix first. This is somewhat ok when the matrix is very sparse, but for dense matrices this is very inefficient.



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