dpois_APA: Arbitrary Precision Poisson density function.

In mrparker909/optimizeAPA: An R Package for Arbitrary Precision Optimization of Multi-parameter Functions

Description

Poisson density function with arbitrary precision. Uses library Rmpfr for arbitrary precision arithmetic.

Usage

dpois_APA(x, lambda, precBits = 128)

Arguments

x	quantile
lambda	poisson mean parameter
precBits	number of bits of precision

Examples

# compare apa to non apa dpois:
sum(dpois_APA(x = 0:70, lambda = 10, precBits = 128))
sum(dpois(x = 0:40, lambda = 10)) # sums to 1, indicating that dpois(x=41, lambda=10) should be zero
dpois(x=41, lambda=10) # is not zero
dpois_APA(x=41, lambda=10, precBits = 128)

mrparker909/optimizeAPA documentation built on June 28, 2020, 3:57 p.m.