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https://issues.apache.org/jira/browse/MATH-262?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phil Steitz closed MATH-262.
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Resolution: Duplicate
Reopened MATH-224
> Utility method to aggregate SummaryStatistics (was MATH-224)
> ------------------------------------------------------------
>
> Key: MATH-262
> URL: https://issues.apache.org/jira/browse/MATH-262
> Project: Commons Math
> Issue Type: New Feature
> Affects Versions: 2.1
> Reporter: Steve Phelps
>
> As per closed issue MATH-224, my project also has a requirement to aggregate
> SummaryStatistics. That is, I would like to keep track of the mean
> \bar{X_i}, and variance of several different random variables { X_1, X_2, ..
> X_n } as separate distributions with separate means \bar{X}_i, and then later
> combine these distributions to estimate the mean and variance of the larger
> combined distribution; eg, the mean and variance of the random variable Y =
> (X_1 + X_2 .. + X_n) / n. I am currently using the patch attached to
> MATH-224 which works for me, however I would prefer to link with a release
> version of the library. Is there any way this issue can be re-opened?
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