dinvchi {nclbayes} | R Documentation |
Density, distribution function, quantile function and random generation for the inverse chi distribution with parameters a and b.
dinvchi(x, a, b) pinvchi(x, a, b) qinvchi(p, a, b) rinvchi(n, a, b)
x |
vector of quantities. |
a |
first parameter. Must be strictly positive. |
b |
second parameter. Must be strictly positive. |
p |
vector of probabilities. |
n |
number of observations. |
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).
dinvchi(1, 2, 2) pinvchi(1, 2, 2) qinvchi(0.95, 2, 2) rinvchi(1, 2, 2)