A knitr source file for including linguistic notation as graphical elements in ggplot2

ling-plot.Rnw

\documentclass{beamer}
\usetheme{Singapore}
\usepackage{tipa}

%% Make the r-code small
\ifdefined\knitrout
  \renewenvironment{knitrout}{\begin{footnotesize}}{\end{footnotesize}}
\else
\fi


\title{Putting IPA Characters in Plots}
\author{Josef Fruehwald}

\begin{document}
%% Don't print errors, warnings, or messages
\SweaveOpts{message=F, error=F, warning=F}

\begin{frame}[fragile]
\frametitle{Set up}
<<>>=
    library(ggplot2)
    library(tikzDevice)
@
\end{frame}

\begin{frame}[fragile]
Just put in any special \LaTeX package you want to use here.
<<tidy=F>>=
options(tikzLatexPackages = c(getOption("tikzLatexPackages"),
                              "\\usepackage{tipa}",
                              "\\usepackage{qtree}"))
@
\end{frame}

\begin{frame}[fragile]
\frametitle{Fake up some data}

<<tidy=F>>=
levels(mpg$drv) <- c("\\textipa{D}",
                     "\\textipa{C}",
                     "\\textipa{P}")
@
\end{frame}

\begin{frame}[fragile]
    \frametitle{Profit}
<<dev="tikz", fig.width=8, fig.height=5, out.width="0.9\\textwidth", fig.align="center", tidy = F>>=
ggplot(mpg, aes(displ, hwy, label = drv, color = drv)) + 
        geom_text() + 
        stat_smooth()+
        xlab("\\textipa{IPA!}")    
@
\end{frame}

\begin{frame}[fragile]
    \frametitle{Profit}
<<dev="tikz", fig.width=8, fig.height=5, out.width="0.7\\textwidth", fig.align="center", tidy = F>>=
ggplot(mpg, aes(displ, hwy, label = drv, color = drv)) + 
        geom_text() + 
        stat_smooth()+
        xlab("\\textipa{IPA!}")+
        annotate(x=5.5, y = 40, geom = "text", 
                 label = "\\Tree [.S \\qroof{I}.NP \\qroof{just blew my own mind}.VP ]")
@
\end{frame}

\begin{frame}[fragile]
\frametitle{Fake up some data}

<<tidy=F>>=
mpg$tree <- "{\\footnotesize \\Tree [.S NP VP ]}"
@
\end{frame}

\begin{frame}[fragile]
    \frametitle{Profit}
<<dev="tikz", fig.width=8, fig.height=5, out.width="0.7\\textwidth", fig.align="center", tidy = F>>=
ggplot(mpg, aes(displ, hwy, label = tree))+
        geom_text() + 
        stat_smooth()+
        xlab("TREES")
@
\end{frame}

\end{document}