MetricsWeighted (version 0.3.0)

deviance_poisson: Poisson Deviance

Description

Weighted average of unit Poisson deviance, see [1]. Special case of Tweedie deviance with Tweedie parameter 1.

Usage

deviance_poisson(actual, predicted, w = NULL, ...)

Arguments

actual

Observed non-negative values.

predicted

Strictly positive predicted values.

w

Optional case weights.

...

Further arguments passed to weighted_mean.

Value

A numeric vector of length one.

References

[1] Jorgensen, B. (1997). The Theory of Dispersion Models. Chapman & Hall/CRC. ISBN 978-0412997112.

See Also

deviance_tweedie.

Examples

# NOT RUN {
deviance_poisson(0:2, c(0.1, 1, 3))
deviance_poisson(0:2, c(0.1, 1, 3), w = c(1, 1, 1))
deviance_tweedie(0:2, c(0.1, 1, 3), tweedie_p = 1)
deviance_tweedie(0:2, c(0.1, 1, 3), tweedie_p = 1.01)
deviance_poisson(0:2, c(0.1, 1, 3), w = 1:3)
# }