[jboss-jira] [JBoss JIRA] (DROOLS-1424) Variance and standard deviation function in Drools out of the box

[Geoffrey De Smet (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-1424?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Geoffrey De Smet reassigned DROOLS-1424:
----------------------------------------

    Assignee: Geoffrey De Smet  (was: Mario Fusco)


> Variance and standard deviation function in Drools out of the box
> -----------------------------------------------------------------
>
>                 Key: DROOLS-1424
>                 URL: https://issues.jboss.org/browse/DROOLS-1424
>             Project: Drools
>          Issue Type: Feature Request
>          Components: core engine
>            Reporter: Geoffrey De Smet
>            Assignee: Geoffrey De Smet
>
> After a bunch of research I've found the way to do this efficiently:
>   https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Online_algorithm
> Simply use Welford's algorithm.



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