# plot.powerTransform

From car v2.0-20
by John Fox

##### plot Method for powerTransform Objects

This function provides a simple function for plotting data using power transformations.

- Keywords
- hplot, regression

##### Usage

```
## S3 method for class 'powerTransform':
plot(x, z = NULL, round = TRUE, plot = pairs, ...)
```

##### Arguments

- x
- name of the power transformation object
- z
- Additional variables of the same length as those used to get the transformation
to be plotted, default is
`NULL`

. - round
- If
`TRUE`

, the default, use rounded transforms, if`FALSE`

use the MLEs. - plot
- Plotting method. Default is
`pairs`

. Another possible choice is`scatterplot.matrix`

from the`car`

package. - ...
- Optional arguments passed to the plotting method

##### Details

The data used to estimate transformations using `powerTransform`

are plotted
in the transformed scale.

##### Value

- None. Produces a graph as a side-effect.

##### References

Weisberg, S. (2014) *Applied Linear Regression*, Fourth Edition, Wiley.
Fox, J. and Weisberg, S. (2011) *An R Companion to Applied Linear Regression*,
Second Edition, Sage.

##### See Also

##### Examples

```
summary(a3 <- powerTransform(cbind(len, ADT, trks, sigs1) ~ hwy, Highway1))
with(Highway1, plot(a3, z=rate, col=as.numeric(hwy)))
```

*Documentation reproduced from package car, version 2.0-20, License: GPL (>= 2)*

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