Returns the population covariance of two numeric expressions that are evaluated using documents in the $setWindowFields stage window.
5.0
https://docs.mongodb.com/manual/reference/operator/aggregation/covariancePop/#mongodb-expression-exp.-covariancePop
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Returns the population covariance of two numeric expressions that are evaluated using documents in the $setWindowFields stage window.
5.0
https://docs.mongodb.com/manual/reference/operator/aggregation/covariancePop/#mongodb-expression-exp.-covariancePop