BEAST v2.5.0 Documentation: beast.math.distributions.Dirichlet

BEASTObject that performs calculations based on the State.
A class that describes a parametric distribution, that is, a distribution that takes some parameters/valuables as inputs and can produce (cumulative) densities and inverse cumulative densities.
Dirichlet distribution. p(x_1,...,x_n;alpha_1,...,alpha_n) = 1/B(alpha) prod_{i=1}^K x_i^{alpha_i - 1} where B() is the beta function B(alpha) = prod_{i=1}^K Gamma(alpha_i)/ Gamma(sum_{i=1}^K alpha_i}.

Inputs:

alpha, offset

 

alpha
type: beast.core.parameter.RealParameter
coefficients of the Dirichlet distribution
Required input

 

offset
type: java.lang.Double
offset of origin (defaults to 0)
Optional input. Default: 0.0