The Dirichlet Distribution — Dirichlet • brms

Density function and random number generation for the dirichlet distribution with shape parameter vector alpha.

ddirichlet(x, alpha, log = FALSE)

rdirichlet(n, alpha)

Arguments

x: Matrix of quantiles. Each row corresponds to one probability vector.
alpha: Matrix of positive shape parameters. Each row corresponds to one probability vector.
log: Logical; If TRUE, values are returned on the log scale.
n: Number of draws to sample from the distribution.

See vignette("brms_families") for details on the parameterization.