Construct a Poisson distribution object.

Source: R/poisson_dist.R

Creates an S3 object representing a Poisson distribution with rate parameter λ. The PMF is P(X=k)=λke−λ/k! for k=0,1,2,….

poisson_dist(lambda)

Arguments

lambda

Rate parameter (mean), must be a positive scalar.

Value

A poisson_dist object with classes c("poisson_dist", "univariate_dist", "discrete_dist", "dist").

Examples

x <- poisson_dist(lambda = 5)
mean(x)
#> [1] 5
vcov(x)
#> [1] 5
format(x)
#> [1] "Poisson distribution (lambda = 5)"