dinvchi: The Inverse Chi distribution

In mas3321: Bayes normal linear model and basic MCMC

Description

Density, distribution function, quantile function and random generation for the inverse chi distribution with parameters a and b

Usage

  dinvchi(x, a, b)

  pinvchi(x, a, b)

  qinvchi(p, a, b)

  rinvchi(n, a, b)

Arguments

x	vector of quantities
p	vector of probabilities
n	number of observations
a	first parameter. Must be strictly positive.
b	second parameter. Must be strictly positive.

Note

If X~Inv-Chi(a,b) then it has density f(x)=2b^ax^(-2*a-1)e^(-b/x^2)/Gamma(a). Also 1/X^2~Gamma(a,b).

Examples

dinvchi(1, 2, 2)
pinvchi(1, 2, 2)
qinvchi(0.95, 2, 2)
rinvchi(1, 2, 2)

mas3321 documentation built on May 2, 2019, 4:42 p.m.