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Posted to dev@mahout.apache.org by "Ted Dunning (JIRA)" <ji...@apache.org> on 2013/12/02 07:53:35 UTC

[jira] [Created] (MAHOUT-1368) Convert OnlineSummarizer to use the new TDigest

Ted Dunning created MAHOUT-1368:
-----------------------------------

             Summary: Convert OnlineSummarizer to use the new TDigest
                 Key: MAHOUT-1368
                 URL: https://issues.apache.org/jira/browse/MAHOUT-1368
             Project: Mahout
          Issue Type: Bug
            Reporter: Ted Dunning
             Fix For: 0.9


The new TDigest provides better accuracy for quartile estimation as well as producing any other quantile you might like.  The current quartile estimation of the OnlineSummarizer fails for highly skewed distributions and can't really be extended to provide other quantiles.  The TDigest handles all of this.



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