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

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.
Inverse Gamma distribution, used as prior. for x>0 f(x; alpha, beta) = rac{beta^alpha}{Gamma(alpha)} (1/x)^{alpha + 1}exp(-beta/x) If the input x is a multidimensional parameter, each of the dimensions is considered as a separate independent component.

Inputs:

alpha, beta, offset

 

alpha
type: beast.core.parameter.RealParameter
shape parameter, defaults to 2
Optional input

 

beta
type: beast.core.parameter.RealParameter
scale parameter, defaults to 2
Optional input

 

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