ppredPG: The Poisson-Gamma Predictive Distribution

In vgharris3/predictiveInference: Predictive Inference Tools for Researchers

The Poisson-Gamma Predictive Distribution

Description

ppredPG returns the cumulative predictive probability of future observation having value 1,...,xmax given observations obs~Poi(theta) and theta~Gamma(alpha,beta)

Usage

ppredPG(ypred, y, alpha = 1, beta = 1, lower = TRUE)

Arguments

ypred	non-negative integer count for which predictive probability is desired
y	vector of (observed) Poisson-distributed counts
alpha	sum of counts from beta prior observations for gamma prior distribution on theta
beta	number of prior observations for gamma prior distribution on theta
lower	logical; if TRUE (default), probabilities are P(R<=q) otherwise P(R>q)

Value

Poisson-Gamma cumulative predictive probability

Examples

1

vgharris3/predictiveInference documentation built on April 23, 2022, 3:11 p.m.