power {stats} | R Documentation

## Create a Power Link Object

### Description

Creates a link object based on the link function eta = mu^lambda.

### Usage

    power(lambda = 1)

### Arguments

`lambda` | a real number.

### Details

If `lambda` is non-positive, it is taken as zero, and the log link is obtained. The default `lambda = 1` gives the identity link.

### Value

A list with components `linkfun`, `linkinv`, `mu.eta`, and `valideta`. See `make.link` for information on their meaning.

### References

Chambers, J. M. and Hastie, T. J. (1992) Statistical Models in S. Wadsworth & Brooks/Cole.

### See Also

`make.link`, `family`

To raise a number to a power, see `Arithmetic`.

To calculate the power of a test, see various functions in the stats package, e.g., `power.t.test`.

### Examples

    power()
    quasi(link=power(1/3))[c("linkfun", "linkinv")]

[Package stats version 2.8.1 Index]