R: plot Method for powerTransform Objects

plot.powerTransform {car}

R Documentation

plot Method for powerTransform Objects

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

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

`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

The data used to estimate transformations using powerTransform are plotted in the transformed scale.

None. Produces a graph as a side-effect.

Sanford Weisberg, <sandy@stat.umn.edu>

Weisberg, S. (2005) Applied Linear Regression, Third Edition. Wiley.

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

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

[Package car version 2.0-12 Index]