A key visualization technique in R is a plot, whether it is a scatter plot, bar histogram, or even a word cloud. The R system provides quite an array of plotting mechanisms, both built into the basic R system and available in a variety of packages.
This chapter will cover plotting in the following ways:
In R, there are several packages available that provide plotting functionalities to the programmer. We will use the following packages in the examples:
car: With a name that is an acronym for Companion to Applied Regression, this package provides the regression tools
lattice: This package provides high-level data visualization
gclus: This package has functions ...