Desktop Survival Guide
by Graham Williams
R produces its graphics on a graphics device. By default, a screen-based graphics device is usually opened when any new plot is generated. Generally, a user will interactively create the graphic they are interested in, as a series of R function calls, and then either request this to be saved to a particular file format, or else will repeat the same sequence of R function calls, but with a different graphics device (associated with a specific file format and filename). The default graphics device tends to be x11 on Unix and GNU/Linux, windows on MS/Windows, and quartz on the Macintosh OS X.