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Posted to dev@mahout.apache.org by "Drew Farris (JIRA)" <ji...@apache.org> on 2009/12/12 03:46:18 UTC
[jira] Commented: (MAHOUT-141) Cluster Centroid improperly reported
when no points associated w/ the cluster
[ https://issues.apache.org/jira/browse/MAHOUT-141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12789665#action_12789665 ]
Drew Farris commented on MAHOUT-141:
------------------------------------
For the case of computeCentriod() in the kmeans package it appears to be resolved. It doesn't appear to be a problem in the canopy, fuzzykmeans or meanshift packages either, but even if it were it should probably be treated as a separate issue.
> Cluster Centroid improperly reported when no points associated w/ the cluster
> -----------------------------------------------------------------------------
>
> Key: MAHOUT-141
> URL: https://issues.apache.org/jira/browse/MAHOUT-141
> Project: Mahout
> Issue Type: Bug
> Components: Clustering
> Affects Versions: 0.1
> Reporter: Grant Ingersoll
> Assignee: Grant Ingersoll
> Priority: Minor
> Fix For: 0.3
>
>
> Per the discussion at http://www.lucidimagination.com/search/document/5d54bb4822354bee/kmeans_help#48571ce2f5014a1f, the Cluster class returns pointTotal as the centroid (center) of a Cluster with zero points, which is not correct. It should return the Center as the centroid in this case.
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