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 stream.
