R: The Inverse Gamma Distribution

InvGamma {MCMCpack}

R Documentation

The Inverse Gamma Distribution

Description

Density function and random generation from the inverse Gamma distribution.

Usage

rinvgamma(n, shape, rate = 1)
dinvgamma(x, shape, rate = 1)

Arguments

`x`	Scalar location to evaluate density.
`n`	Number of draws from the distribution.
`shape`	Scalar shape parameter.
`rate`	Scalar rate parameter (default value one).

Value

dinvgamma evaluates the density at x. rinvgamma takes n draws from the inverse Gamma distribution. The parameterization is consistent with the Gamma Distribution in the stats package.

Examples

density <- dinvgamma(4.2, 1.1)
draws <- rinvgamma(10, 3.2)