\name{Dirichlet}\alias{Dirichlet}\alias{ddirichlet}\alias{rdirichlet}\title{The Dirichlet Distribution}\description{  Density function and random generation from the Dirichlet distribution.}\usage{ddirichlet(x, alpha)rdirichlet(n, alpha)}\arguments{  \item{x}{A vector containing a single deviate or matrix containing    one random deviate per row.}  \item{n}{Number of random vectors to generate. }  \item{alpha}{Vector of shape parameters, or matrix of shape    parameters corresponding to the number of draw.}}\details{  The Dirichlet distribution is the multidimensional generalization of  the beta distribution. }\value{  \code{ddirichlet} gives the density. \code{rdirichlet} returns a  matrix with \code{n} rows, each containing a single Dirichlet random  deviate.}\author{  Code is taken from Greg's Miscellaneous Functions (gregmisc).  His  code was based on code posted by Ben Bolker to R-News on 15 Dec  2000.}  \seealso{ \code{\link[stats]{Beta}} }\examples{  density <- ddirichlet(c(.1,.2,.7), c(1,1,1))  draws <- rdirichlet(20, c(1,1,1) )}\keyword{distribution}