power
Generate a Power Link Object

Description

Creates a parametrized link subfamily with components: name, link, inverse, deriv, and initialize. The value of each component depends on the value of lambda.

Usage

power(lambda = 1)

Arguments

lambda a numeric value that specifies the power parameter, (typically within three units of zero). The NA value is not allowed.

Details

If lambda is less than zero, it is taken as zero (implies log link).
Value
a power link object with class attribute "link-glm", which is a list of functions and expressions, including
linkfun
linkinv
mu.eta
valideta
name
See the family.object help file for a description of the components.
The value of lambda less than or equal to 0 is a limiting case, and results in the log link function. The value 1 for lambda will return the identity link function.
See Also
make.link, glm, family, family.object.
Examples
quasi(link = power(1/4)) 
quasi(link = power(0))[c("family", "link", "linkfun", "linkinv")]
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