| make.link {stats} | R Documentation |
This function is used with the family functions in
glm().
Given a link, it returns a link function, an inverse link
function, the derivative dmu/deta and a function
for domain checking.
make.link(link)
link |
character or numeric; one of "logit",
"probit", "cloglog", "identity",
"log", "sqrt", "1/mu^2",
"inverse", or number, say lambda resulting
in power link mu ^ lambda. |
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 all of
eta is in the domain of linkinv }. |
str(make.link("logit"))
l2 <- make.link(2)
l2$linkfun(0:3)# 0 1 4 9
l2$mu.eta(eta= 1:2)#= 1/(2*sqrt(eta))