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average

Create an AggregateField object that can be used to compute the average of a specified field over a range of documents in the result set of a query.

function average(field: string | FieldPath): AggregateField<number | null>;

average(field: string | FieldPath): AggregateField<number | null>

§Parameters

field: string | FieldPath

Specifies the field to average across the result set.

§Return Type

AggregateField<number | null>