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https://issues.apache.org/jira/browse/EDGENT-409?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dale LaBossiere closed EDGENT-409.
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> Add analytic aggregations for non-JsonObject types
> --------------------------------------------------
>
> Key: EDGENT-409
> URL: https://issues.apache.org/jira/browse/EDGENT-409
> Project: Edgent
> Issue Type: New Feature
> Components: Analytics
> Reporter: Dale LaBossiere
> Assignee: Dale LaBossiere
> Fix For: Apache Edgent 1.2.0
>
>
> On more than one occasion I've found myself wishing for analytic aggregations
> like our {{o.a.e.analytics.math3.stat.Statistic.MEAN}}, etc but either being
> unable to use {{JsonAnalytics}} because it lacks batched aggregation support
> or simply wanting something less cumbersome to use because I had a simple use
> case - e.g., wanting to compute a windowed MEAN for a TStream<Double>
> yielding a stream of TStream<Double>.
> Life would be better if there were Collection-based (not TStream/TWindow
> based) aggregation methods supporting the same set of Statistic and
> Regression aggregate ops that have been defined for use on JsonObjects. For
> example,
> {code}
> static double aggregate(Collection<? extends Number> c, UnivariateAggregate
> stat)
> {code}
> See the associated PR for the full API, etc.
> Unfortunately the existing {{o.a.e.analytics.math3.stat.Statistic}} and
> Regression enums lack a "Json" name or package prefix though they are
> inherently tied to other unnecessarily Json-specific interfaces/classes.
> That results in the need to define tuple-type-agnostic analogs like
> Statistics2 and Regression2 (for lack of something better) and the supporting
> interfaces/classes.
> Not included with this JIRA/PR is the opportunity to then unify around using
> these new tuple-type-agnostic Statistic2,Regression2 by augmenting
> JsonAnalytics to have methods that take them as arguments. Then
> json-specific Statistic, Regression and the JsonAnalytic methods that use
> them can be marked deprecated.
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