make.link
Create a Link for GLM Families

Description

This function create the link, inverse link, derivative and validity functions used in GLM families.

Usage

make.link(link)

Arguments

link character string specifiying the link function, "logit", "probit", "cauchit", "cloglog", "identity", "log", "sqrt", "1/mu^2" or "inverse".
Value
an object of class "link-glm" with following components:

linkfun link function with argument mu that transforms from the scale of the mean to the scale of the linear or additive predictor eta.
linkinv function with argument eta that defines the inverse of the link.
mu.eta function with argument eta that defines the derivative of the linkinv function.
valideta logical function with argument eta that indicates the validity of eta in linkinv.
name argument of link name.
See Also
family, family.object, glm
Examples
make.link("logit")
make.link("1/mu^2")
make.link(3)   # same as make.link("cauchit")
make.link(10) # Error: "10" link not recognised
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