Will Lauer 189376a6f9 Adding optional error bounds to sketch aggs and post-aggs
By setting a new optional parameter, `errorBoundsStdDev`, to the number
of standard deviations to use when computing error bounds, the return
type for both the SketchMergeAggregator and the SketchEstimate
PostAggregator can be changed from a simple double (estimate) to a JSON
object containing the estimate, expected high bound, expected low bound,
and standard devations used when computing bounds (same value as passed
in).
2016-02-11 10:18:16 -06:00
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This module provides druid aggregators based on http://datasketches.github.io/ .

Credits: This module is a result of feedback and work done by following people.

https://github.com/cheddar https://github.com/himanshug https://github.com/leerho https://github.com/will-lauer