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From "Emmanuel Bourg (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (MATH-978) StorelessCovariance to be map/reducable
Date Fri, 31 May 2013 06:13:20 GMT

     [ https://issues.apache.org/jira/browse/MATH-978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Emmanuel Bourg reopened MATH-978:
---------------------------------


Thank you for the patch Ajo. I'm reopening the issue because we usually mark as fixed only
when the change has been applied to the code.
                
> StorelessCovariance to be map/reducable
> ---------------------------------------
>
>                 Key: MATH-978
>                 URL: https://issues.apache.org/jira/browse/MATH-978
>             Project: Commons Math
>          Issue Type: New Feature
>            Reporter: Ajo Fod
>         Attachments: vcs-diff1930559867411001739.patch
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> Current version of StorelessCovariance and StorelessBivariateCovariance don't allow adding
another StorelessCovariance to an existing one. With this feature it is possible to run maps
on different data sets and then do a final reduce to get the overall covariance.

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