bftprimeinv: Inverse of first derivative of cobin cumulant (log partition)...

In cobin: Cobin and Micobin Regression Models for Continuous Proportional Data

Inverse of first derivative of cobin cumulant (log partition) function

Description

Calculates (B')^{-1}(y) using numerical inversion (Newton-Raphson), where B'(x) = 1/(1-\exp(-x))-1/x. This is the cobit link function g, the canonical link function of cobin.

Usage

bftprimeinv(y, x0 = 0, tol = 1e-08, maxiter = 100)

cobitlink(y, x0 = 0, tol = 1e-08, maxiter = 100)

Arguments

y	input vector
x0	Defult 0, initial value
tol	tolerance, stopping criterion for Newton-Raphson
maxiter	max iteration of Newton-Raphson

Value

(B')^{-1}(y)

cobin documentation built on Sept. 2, 2025, 1:08 a.m.