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 $d\mu / d\eta$ 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
linkfunLink function function(mu)
linkinvInverse link function function(eta)
mu.etaDerivative function(eta) $d\mu / d\eta$
validetafunction(eta){ TRUE if
eta is in the domain of linkinv }.