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https://issues.apache.org/jira/browse/MATH-1016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13728141#comment-13728141
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Phil Steitz commented on MATH-1016:
-----------------------------------

This is partially implemented now in AggregateSummaryStatistics, but I agree it 
would be better to have it implemented by the statistics themselves.  I would 
prefer the name "append" for the aggregating method to be consistent with what 
we have used elsewhere.  Also, it should be typesafe, so if we do define an 
interface to signal it, we should parameterize the interface with the type of 
the stat.
                
> Making the first and second moments reducable. So should Storeless stats in 
> general.
> ------------------------------------------------------------------------------------
>
>                 Key: MATH-1016
>                 URL: https://issues.apache.org/jira/browse/MATH-1016
>             Project: Commons Math
>          Issue Type: New Feature
>            Reporter: Ajo Fod
>         Attachments: patch.txt
>
>
> The storeless stats in general should be "Reducable" to be used in the 
> Map/Reduce framework.

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