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