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https://issues.apache.org/jira/browse/MAHOUT-1368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13839835#comment-13839835
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Hudson commented on MAHOUT-1368:
--------------------------------
SUCCESS: Integrated in Mahout-Quality #2352 (See
[https://builds.apache.org/job/Mahout-Quality/2352/])
MAHOUT-1368: Convert OnlineSummarizer to use the new TDigest (smarthi: rev
1547911)
* /mahout/trunk/CHANGELOG
*
/mahout/trunk/examples/src/main/java/org/apache/mahout/clustering/streaming/tools/ClusterQualitySummarizer.java
*
/mahout/trunk/math/src/main/java/org/apache/mahout/math/stats/OnlineSummarizer.java
*
/mahout/trunk/math/src/test/java/org/apache/mahout/math/stats/OnlineSummarizerTest.java
> 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
> Assignee: Suneel Marthi
> Fix For: 0.9
>
> Attachments: MAHOUT-1368.patch
>
>
> 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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