spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Debasish Das (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-4823) rowSimilarities
Date Sun, 08 Mar 2015 06:42:38 GMT

    [ https://issues.apache.org/jira/browse/SPARK-4823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14351948#comment-14351948
] 

Debasish Das commented on SPARK-4823:
-------------------------------------

[~mengxr] I need level 3 BLAS for this JIRA as well as https://issues.apache.org/jira/browse/SPARK-4675...Specifically
I am looking for dense matrix x dense matrix and dense matrix x sparse matrix...Does breeze
CSCMatrix support BLAS 3 based dense matrix x CSCMatrix product ? I had some code with breeze
dot and it was extremely slow...I will migrate the code to netlib java BLAS from mllib and
update the results on the JIRA...

> rowSimilarities
> ---------------
>
>                 Key: SPARK-4823
>                 URL: https://issues.apache.org/jira/browse/SPARK-4823
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>            Reporter: Reza Zadeh
>
> RowMatrix has a columnSimilarities method to find cosine similarities between columns.
> A rowSimilarities method would be useful to find similarities between rows.
> This is JIRA is to investigate which algorithms are suitable for such a method, better
than brute-forcing it. Note that when there are many rows (> 10^6), it is unlikely that
brute-force will be feasible, since the output will be of order 10^12.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org


Mime
View raw message