[
https://issues.apache.org/jira/browse/MAHOUT-1297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13789594#comment-13789594
]
Dmitriy Lyubimov edited comment on MAHOUT-1297 at 10/8/13 7:41 PM:
-------------------------------------------------------------------
{code}
A.t
{code}
is now a view based on MAHOUT-1300. To actually get a by-value transposed copy
of A, one can use
{code}
A.t cloned
{code}
This is based on observation that people actually really need to actually
materialize a transposed matrix as a copy.
Also, in-core ssvd now uses random matrix functional view (instead of actual
memory-materialized random matrix). I guess i will use the same mechanics in
the distributed spark version too.
was (Author: dlyubimov):
{code}
A.t
{code]
is now a view based on MAHOUT-1300. To actually get a by-value transposed copy
of A, one can use
{code}
A.t cloned
{code}
This is based on observation that people actually really need to actually
materialize a transposed matrix as a copy.
Also, in-core ssvd now uses random matrix functional view (instead of actual
memory-materialized random matrix). I guess i will use the same mechanics in
the distributed spark version too.
> New module for linear algebra scala DSL (in-core operators support only to
> start with)
> --------------------------------------------------------------------------------------
>
> Key: MAHOUT-1297
> URL: https://issues.apache.org/jira/browse/MAHOUT-1297
> Project: Mahout
> Issue Type: New Feature
> Affects Versions: 0.8
> Reporter: Dmitriy Lyubimov
> Assignee: Dmitriy Lyubimov
> Fix For: 0.9
>
>
> See initial set of in-core R-like operations here
> http://weatheringthrutechdays.blogspot.com/2013/07/scala-dsl-for-mahout-in-core-linear.html.
> A separate DSL for matlab-like syntax is being developed. The differences
> here are about replacing R-like %*% with * and finding another way to express
> elementwise * and /.
--
This message was sent by Atlassian JIRA
(v6.1#6144)
