ggpcp {ggplot2}R Documentation

Parallel coordinates plot.

Description

Generate a plot ``template'' for a parallel coordinates plot.

Usage

ggpcp(data, vars=names(data), scale="range", ...)

Arguments

data data frame
vars variables to include in parallel coordinates plot
scale scaling function, one of "range", "var" or "I"
... other arguments passed on plot creation

Details

One way to think about a parallel coordinates plot, is as plotting the data after it has transformation been transformed to gain a new variable. This function does this using \melt.

This gives us enormous flexibility as we have separated out the type of drawing (lines by tradition) and can now use any of the existing geom functions. In particular this makes it very easy to create parallel boxplots, as shown in the example.

Author(s)

Hadley Wickham <h.wickham@gmail.com>

Examples

ggpcp(mtcars) + geom_line()
ggpcp(mtcars, scale="var") + geom_line()
ggpcp(mtcars, vars=names(mtcars)[3:6], formula= . ~cyl, scale="I") + geom_line()
ggpcp(mtcars, scale="I") + geom_boxplot(aes(group=variable))
ggpcp(mtcars, vars=names(mtcars[2:6])) + geom_line()
p <- ggpcp(mtcars, vars=names(mtcars[2:6]), formula=.~vs)
p + geom_line()
p + geom_line(aes(colour=mpg)) 

[Package ggplot2 version 0.8.2 Index]