Poisson normalisation via the exponential series

The truncated Taylor sum for e^a times e^-a, which is 1 when the series has converged.

Usage

PoisNorm(a, terms = 40)

Arguments

a

series argument.

terms

number of Taylor terms, >= 0.

Value

list(normalization, error).

References

Morin, D. J. (2016). Probability: For the Enthusiastic Beginner. Createspace. Eq (7.10).

Examples

PoisNorm(3)$error
#> [1] 3.330669e-16