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Specifies Dirichlet prior for a discrete probability distribution.
DirichletPrior(prior.counts, initial.value = NULL)
A vector of positive numbers representing prior counts.
The initial value in the MCMC algorithm of the distribution being modeled.
Steven L. Scott steve.the.bayesian@gmail.com
Gelman, Carlin, Stern, Rubin (2003), "Bayesian Data Analysis", Chapman and Hall.