I’m resurrecting this thread because I’m interested in doing transpose on a RowMatrix.

There is this other thread too: http://apache-spark-user-list.1001560.n3.nabble.com/Matrix-multiplication-in-spark-td12562.html

Which presents https://issues.apache.org/jira/browse/SPARK-3434 which is still in work at this time.

Is this the correct Jira issue for the transpose operation? ETA?


Thanks a lot!



From: Reza Zadeh [mailto:reza@databricks.com]
Sent: October-15-14 1:48 PM
To: ll
Cc: user@spark.incubator.apache.org
Subject: Re: RowMatrix.multiply() ?



We are currently working on distributed matrix operations. Two RowMatrices cannot be currently multiplied together. Neither can be they be added. They functionality will be added soon.


You can of course achieve this yourself by using IndexedRowMatrix and doing one join per operation you requested.





On Wed, Oct 15, 2014 at 8:50 AM, ll <duy.huynh.uiv@gmail.com> wrote:

hi.. it looks like RowMatrix.multiply() takes a local Matrix as a parameter
and returns the result as a distributed RowMatrix.

how do you perform this series of multiplications if A, B, C, and D are all

((A x B) x C) x D)


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