Using R and RStudio for Data Management, Statistical Analysis, and Graphics, 2nd Edition

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“K23166” — 2015/1/28 — 9:35 — page 145 — #171

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Chapter 9

Graphical options and

configuration

This chapter describes how to annotate graphical displays and change defaults to create

publication-quality figures, as well as details regarding how to output graphics in a variety

of file formats (9.3).

9.1 Adding elements

It is relatively simple to add features to graphs that have been generated by one of the

functions discussed in Chapter 8 that uses base graphics. For example, adding an arbitrary

line to a graphic requires only one function call with the two endpoints as arguments (9.1.1).

Other mechanisms to add to existing graphs created using the