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Posted to issues@spark.apache.org by "Joseph K. Bradley (JIRA)" <ji...@apache.org> on 2015/05/20 22:48:59 UTC

[jira] [Commented] (SPARK-7757) mllib IndexedRowMatrix multiply IndexedRowMatrix

    [ https://issues.apache.org/jira/browse/SPARK-7757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14553080#comment-14553080 ] 

Joseph K. Bradley commented on SPARK-7757:
------------------------------------------

This is supported by BlockMatrix, not the other distributed matrices, since block partitioning makes distributed matrix multiplication much more efficient.  You should convert the IndexedRowMatrix to a block matrix (by hand, currently) and then use BlockMatrix multiplication.  Good luck!

> mllib IndexedRowMatrix multiply IndexedRowMatrix
> ------------------------------------------------
>
>                 Key: SPARK-7757
>                 URL: https://issues.apache.org/jira/browse/SPARK-7757
>             Project: Spark
>          Issue Type: Question
>            Reporter: zhaoxiangyu
>
> In mllib
> IndexedRowMatrix.multiply(b)
> b must be a local Matrix,can't be an IndexedRowMatrix
> I want to know if there is some way to calculate IndexedRowMatrix.multiply(IndexedRowMatrix)



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