lowing two computations
A*b
and
A^T*c
I don't think this is possible without being able to transpose a rowmatrix. Am
I correct?
Thanks,
Alex
From: Reza Zadeh
Sent: Monday, January 12, 2015 1:58 PM
To: Alex Minnaar
Cc: u...@spark.incubator.apache.org
Subject: Re: RowMatrix multipli
t: Re: RowMatrix multiplication
Yes you are correct, to do it with existing operations you would need a
transpose on rowmatrix.
However, you can fairly easily perform the operation manually by doing a join
(if the c vector is an RDD) or broadcasting c (if the c vector is small enough
to fit in m
om:* Reza Zadeh
> *Sent:* Monday, January 12, 2015 1:58 PM
> *To:* Alex Minnaar
> *Cc:* u...@spark.incubator.apache.org
> *Subject:* Re: RowMatrix multiplication
>
> As you mentioned, you can perform A * b, where A is a rowmatrix and b is
> a local matrix.
>
> From your email, I figure
e without being able to transpose a rowmatrix. Am
I correct?
Thanks,
Alex
From: Reza Zadeh
Sent: Monday, January 12, 2015 1:58 PM
To: Alex Minnaar
Cc: u...@spark.incubator.apache.org
Subject: Re: RowMatrix multiplication
As you mentioned, you can perform A
As you mentioned, you can perform A * b, where A is a rowmatrix and b is a
local matrix.
>From your email, I figure you want to compute b * A^T. To do this, you can
compute C = A b^T, whose result is the transpose of what you were looking
for, i.e. C^T = b * A^T. To undo the transpose, you would h
I have a rowMatrix on which I want to perform two multiplications. The first
is a right multiplication with a local matrix which is fine. But after that I
also wish to right multiply the transpose of my rowMatrix with a different
local matrix. I understand that there is no functionality to tr
