idigamma function

Inverse digamma function

inverse of digamma. digamma function is the first derivative of gamma function divided by gamma function.

idigamma(y)

Arguments

• y: a numeric vector.

Examples

idigamma(2)
plot(digamma, 0.1, 3)
plot(idigamma, -10.4, 0.9)

Author(s)

Hunyong Cho, Chuwen Liu, Jinyoung Park, and Di Wu