6ba144ae31
Adds a new single-value metrics aggregation that computes the weighted average of numeric values that are extracted from the aggregated documents. These values can be extracted from specific numeric fields in the documents. When calculating a regular average, each datapoint has an equal "weight"; it contributes equally to the final value. In contrast, weighted averages scale each datapoint differently. The amount that each datapoint contributes to the final value is extracted from the document, or provided by a script. As a formula, a weighted average is the `∑(value * weight) / ∑(weight)` A regular average can be thought of as a weighted average where every value has an implicit weight of `1`. Closes #15731 |
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