beta.prior: Beta prior for a binomial proportion
Description
Specifies beta prior distribution for a binomial
probability parameter.Usage
BetaPrior(a = 1, b = 1, mean = NULL, sample.size = NULL)
Arguments
a
A positive real number interpretable as a prior success count.
b
A positive real number interpretable as a prior failure
count.
mean
A positive real number representing a/(a+b).
sample.size
A positive real number representing a+b.
Details
The distribution should be specified either with a and
b, or with mean and sample.size.
References
Gelman, Carlin, Stern, Rubin (2003), "Bayesian Data Analysis", Chapman
and Hall.