Provides a graphics output device for R that records plots in a
LaTeX-friendly format. The device transforms plotting commands issued by R
functions into LaTeX code blocks. When included in a LaTeX document, these
blocks are interpreted with the help of 'TikZ'---a graphics package for
TeX and friends written by Till Tantau. Using the 'tikzDevice', the text
of R plots can contain LaTeX commands such as mathematical formula. The
device also allows arbitrary LaTeX code to be inserted into the output
