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Posted to dev@mahout.apache.org by "Dan Filimon (JIRA)" <ji...@apache.org> on 2013/06/11 22:33:21 UTC

[jira] [Created] (MAHOUT-1255) Change BallKMeans weighting to use log(weight)

Dan Filimon created MAHOUT-1255:
-----------------------------------

             Summary: Change BallKMeans weighting to use log(weight)
                 Key: MAHOUT-1255
                 URL: https://issues.apache.org/jira/browse/MAHOUT-1255
             Project: Mahout
          Issue Type: Improvement
    Affects Versions: 0.8
            Reporter: Dan Filimon
            Assignee: Dan Filimon
            Priority: Minor


Weirdness is happening in the reducer when doing k-means++ sampling by weights.

Change from multiplying the probability with the weight to multiplying by 2 * log(weight).

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