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

### 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 4.3.0

Index]