VGAM (version 1.1-12)

linkfun: Link Functions for VGLMs

Description

Returns the link functions, and parameter names, for vector generalized linear models (VGLMs).

Usage

linkfun(object, ...)
linkfunvlm(object, earg = FALSE, ...)

Value

Usually just a (named) character string, with the link functions in order. It is named with the parameter names. If earg = TRUE then a list with the following components.

link

The default output.

earg

The extra arguments, in order.

Arguments

object

An object which has parameter link functions, e.g., has class "vglm".

earg

Logical. Return the extra arguments associated with each link function? If TRUE then a list is returned.

...

Arguments that might be used in the future.

Author

Thomas W. Yee

Details

All fitted VGLMs have a link function applied to each parameter. This function returns these, and optionally, the extra arguments associated with them.

See Also

linkfun, multilogitlink, vglm.

Examples

pneumo <- transform(pneumo, let = log(exposure.time))
fit1 <- vglm(cbind(normal, mild, severe) ~ let, propodds, data = pneumo)
coef(fit1, matrix = TRUE)
linkfun(fit1)
linkfun(fit1, earg = TRUE)

fit2 <- vglm(cbind(normal, mild, severe) ~ let, multinomial, data = pneumo)
coef(fit2, matrix = TRUE)
linkfun(fit2)
linkfun(fit2, earg = TRUE)