The beamer class is a LaTeX class for creating presentations using a video projector. It offers incremental display, prearranged themes, automatic table of contents, navigation bars, bibliographies, and other features. Can be used with pdflatex and LyX.
The TikZ device enables LaTeX-ready output from R graphics functions. This is done by producing code that can be understood by the TikZ graphics language. All text in a graphic output with the tikz() function will can be typeset by LaTeX and therefore will match whatever fonts are currently used in
... [More] the document. This also means that LaTeX mathematics can be typeset directly into labels and annotations! Graphics produced this way can also be annotated with custom TikZ commands. [Less]