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This function provides a simple function for plotting data using power transformations.
# S3 method for powerTransform
plot(x, z = NULL, round = TRUE, plot = pairs, ...)name of the power transformation object
Additional variables of the same length as those used to get the transformation
to be plotted, default is NULL.
If TRUE, the default, use rounded transforms, if FALSE use the MLEs.
Plotting method. Default is pairs. Another possible choice is
scatterplot.matrix from the car package.
Optional arguments passed to the plotting method
None. Produces a graph as a side-effect.
The data used to estimate transformations using powerTransform are plotted
in the transformed scale.
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.
summary(a3 <- powerTransform(cbind(len, adt, trks, shld, sigs1) ~ 1, Highway1))
with(Highway1, plot(a3, z=rate, col=as.numeric(htype)))
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