linkfun.vglm {VGAM} | R Documentation

## Link Functions for VGLMs

### Description

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

### Usage

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

### Arguments

`object` | Object of class `"vglm"`, i.e., a VGLM object.
`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.

### Details

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

### 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.

### Note

Presently, the multinomial logit model has only one link function, `multilogit`, so a warning is not issued for that link. For other models, if the number of link functions does not equal M then a warning may be issued.

### Author(s)

Thomas W. Yee

### See Also

`linkfun`, `multilogit`, `vglm`.

### Examples

    fit1 <- vgam(cbind(r1, r2) ~ s(year, df = 3), gev(zero = 2:3), data = venice)
    coef(fit1, matrix = TRUE)
    linkfun(fit1)
    linkfun(fit1, earg = TRUE)

[Package VGAM version 1.0-4 Index]