R: Create a Link for GLM Families

make.link {stats}

R Documentation

Create a Link for GLM Families

Description

This function is used with the family functions in glm(). Given the name of a link, it returns a link function, an inverse link function, the derivative dmu/deta and a function for domain checking.

Usage

make.link(link)

Arguments

link

character; one of "logit", "probit", "cauchit", "cloglog", "identity", "log", "sqrt", "1/mu^2", "inverse".

Value

A object of class "link-glm", a list with components

`linkfun`	Link function `function(mu)`
`linkinv`	Inverse link function `function(eta)`
`mu.eta`	Derivative `function(eta)` dmu/deta
`valideta`	`function(eta)`{ `TRUE` if `eta` is in the domain of `linkinv` }.
`name`	a name to be used for the link

Examples

utils::str(make.link("logit"))