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From "Lance Norskog (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAHOUT-563) CanopyEstimator - Estimate T1/T2 for CanopyClusterer
Date Thu, 10 Feb 2011 08:58:01 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12992942#comment-12992942
] 

Lance Norskog commented on MAHOUT-563:
--------------------------------------

The estimator samples 20 points and tries to guess T1/T2 from that subset. Yes, "all distances"
is not a scalable technique.
bq. Uhh... this isn't a graph.
Yup, brain-hiccup. 





> CanopyEstimator - Estimate T1/T2 for CanopyClusterer
> ----------------------------------------------------
>
>                 Key: MAHOUT-563
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-563
>             Project: Mahout
>          Issue Type: New Feature
>          Components: Clustering
>            Reporter: Lance Norskog
>            Assignee: Sean Owen
>            Priority: Minor
>         Attachments: MAHOUT-563.patch
>
>
> Hunting for T1/T2 values that make an interesting Canopy set is a singularly unsatisfying
task. This class estimates T1 and T2 numbers given the original set.

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