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Date: Thu, 1 Jul 2010 22:46:49 -0400 (EDT)
From: "Drew Farris (JIRA)" <jira@apache.org>
To: dev@mahout.apache.org
Subject: [jira] Resolved: (MAHOUT-401) Use NamedVector in seq2sparse
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     [ https://issues.apache.org/jira/browse/MAHOUT-401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Drew Farris resolved MAHOUT-401.
--------------------------------

         Assignee: Drew Farris
    Fix Version/s: 0.4
       Resolution: Fixed

Actually, most of this was committed as a part of MAHOUT-167 (committed in r952758) - the only thing missing was the fix to PartialVectorMergeReducer, which I've committed.

> Use NamedVector in seq2sparse
> -----------------------------
>
>                 Key: MAHOUT-401
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-401
>             Project: Mahout
>          Issue Type: Bug
>          Components: Utils
>    Affects Versions: 0.4
>            Reporter: Drew Farris
>            Assignee: Drew Farris
>             Fix For: 0.4
>
>         Attachments: MAHOUT-401.patch, pv.patch
>
>
> In seq2sparse, TFIDFPartialVectorReducer and TFPartialVectorReducer should write NamedVectors. It appears that a lack of labels on the vector input to k-means at least breaks the cluster-dumper in the sense that it no longer prints the original document ids for points.
> See: http://lucene.472066.n3.nabble.com/where-are-the-points-in-each-cluster-kmeans-clusterdump-td838683.html#a845600
> I wonder if this is also an issue with the code that generates vectors from lucene indexes?

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