idigamma {estimators}

Polygamma Functions

Description

This set of functions revolve around the polygamma functions.

Usage

idigamma(x)

Ddigamma(x, y)

Dtrigamma(x, y)

gammap(x, p, log = FALSE)

Arguments

x, y

numeric. The points to evaluate the function.

p

integer. The p-variate Gamma function.

log

logical. Should the logarithm of the result be returned?

Value

numeric. The evaluated function.

Functions

• idigamma(): inverse digamma function.

• Ddigamma(): digamma difference function.

• Dtrigamma(): trigamma difference function.

• gammap(): p-variate gamma function

Examples

idigamma(2)
Ddigamma(2, 3)
Dtrigamma(2, 3)
gammap(1:3, 3)