Add a rate measure to an ensemble — ens_add

An ensemble operation (`ens_` family): dispatches on the ensemble class, so the class – not a name prefix on the caller – carries the "operates on an ensemble" meaning, matching [nowcast_quasipoisson_v1()] / [short_term_trend()].

Usage

ens_add_rate(x, ...)

# S3 method for class 'csfmt_ensemble_v3'
ens_add_rate(x, numerator, denominator, per = 100, name = NULL, ...)

Arguments

x: A `csfmt_ensemble_v3`.
...: Passed to methods.
numerator, denominator: Measure names present in `$draws`.
per: Scaling factor (e.g. 100 for percent).
name: Optional output measure name (defaults to the grammar name).

Value

`x` with the rate measure added to `$draws`.