beta.binomial {BAS} | R Documentation |
Creates an object representing the prior distribution on models for BAS.
beta.binomial(alpha=1.0, beta=1.0)
alpha |
parameter in the beta prior distribution |
beta |
parameter in the beta prior distribution |
The beta-binomial distribution on model size is obtained by assigning each variable inclusion indicator independent Bernoulli distributions with probability w, and then giving w a beta(alpha,beta) distribution. Marginalizing over w leads to the distribution on model size having the beta-binomial distribution. The default hyperparaeters lead to a uniform distribution over model size.
returns an object of class "prior", with the family and hyerparameters.
Merlise Clyde
beta.binomial(1,10)