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https://issues.apache.org/jira/browse/MAHOUT-444?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Dunning updated MAHOUT-444:
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Status: Patch Available (was: Open)
Here is a patch with an object that estimates the five quartiles, mean and
standard deviation. The associated tests indicate that it is pretty much as
accurate as if all of the samples were kept and the empirical rank statistics
were computed directly.
> Need on-line distribution summary statistics ... mean, median, min, max q25,
> q75
> --------------------------------------------------------------------------------
>
> Key: MAHOUT-444
> URL: https://issues.apache.org/jira/browse/MAHOUT-444
> Project: Mahout
> Issue Type: Bug
> Reporter: Ted Dunning
>
> For the on-line learning algorithms it is very helpful to have robust on-line
> estimate of various summary statistics.
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