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Posted to dev@mahout.apache.org by "Grant Ingersoll (JIRA)" <ji...@apache.org> on 2009/06/29 19:20:47 UTC
[jira] Created: (MAHOUT-141) Cluster Centroid improperly reported
when no points associated w/ the cluster
Cluster Centroid improperly reported when no points associated w/ the cluster
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Key: MAHOUT-141
URL: https://issues.apache.org/jira/browse/MAHOUT-141
Project: Mahout
Issue Type: Bug
Components: Clustering
Reporter: Grant Ingersoll
Assignee: Grant Ingersoll
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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[jira] Resolved: (MAHOUT-141) Cluster Centroid improperly reported
when no points associated w/ the cluster
Posted by "Sean Owen (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sean Owen resolved MAHOUT-141.
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Resolution: Fixed
> 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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[jira] Commented: (MAHOUT-141) Cluster Centroid improperly reported
when no points associated w/ the cluster
Posted by "Drew Farris (JIRA)" <ji...@apache.org>.
[ 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:
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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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[jira] Updated: (MAHOUT-141) Cluster Centroid improperly reported
when no points associated w/ the cluster
Posted by "Sean Owen (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sean Owen updated MAHOUT-141:
-----------------------------
Priority: Minor (was: Major)
Affects Version/s: 0.1
Fix Version/s: 0.3
Marking for 0.3 as it sounds like a small bug. Pinging this issue, still active?
> 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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You can reply to this email to add a comment to the issue online.