You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@mahout.apache.org by "Dmitriy Lyubimov (JIRA)" <ji...@apache.org> on 2015/06/24 19:31:04 UTC
[jira] [Commented] (MAHOUT-1754) Distance and squared distance
matrix routines
[ https://issues.apache.org/jira/browse/MAHOUT-1754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14599786#comment-14599786 ]
Dmitriy Lyubimov commented on MAHOUT-1754:
------------------------------------------
part of a cumulative patch in https://github.com/apache/mahout/pull/145
(asfgit can't broadcast on multiple issues in same PR)
> Distance and squared distance matrix routines
> ---------------------------------------------
>
> Key: MAHOUT-1754
> URL: https://issues.apache.org/jira/browse/MAHOUT-1754
> Project: Mahout
> Issue Type: Blog - New Blog Request
> Reporter: Dmitriy Lyubimov
> Assignee: Dmitriy Lyubimov
> Fix For: 0.10.2
>
>
> R analogs: dist()
> this issue suggests to provide routine for distance and squared distance matrix computation.
> Since most of the use actually requires or can use square distance routine, we suggest to provide both squared and non-squared eucledian distance matrices.
> By convention, distributed versions are prepended by (d) letter:
> dist(x)
> sqDist(x)
> dsqDist
> The points are assumed to be row-wise.
> We also provide variation for pair-wise distance matrix of two different inputs x and y:
> sqDist(x,y)
> dsqDist(x,y).
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)