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Posted to dev@mahout.apache.org by "Lance Norskog (JIRA)" <ji...@apache.org> on 2011/02/10 10:03:57 UTC

[jira] Issue Comment Edited: (MAHOUT-563) CanopyEstimator - Estimate T1/T2 for CanopyClusterer

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

Lance Norskog edited comment on MAHOUT-563 at 2/10/11 9:03 AM:
---------------------------------------------------------------

Clearly one estimator does not fit all datasets. Is it worth pursuing different estimators?

bq. Uhh... this isn't a graph.
Yup, brain-hiccup. 





      was (Author: lancenorskog):
    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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