Geoffrey De Smet created DROOLS-1424:
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Summary: 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: Mario Fusco
After a bunch of research I've found the way to do this efficiently:
https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Online_...
Simply use Welford's algorithm.
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