[R] Newbie help with Sweave

From: Zembower, Kevin <kzembowe_at_jhuccp.org>
Date: Mon, 24 Mar 2008 16:14:40 -0400


I think I've gotten my Emacs/Sweave/R system set up correctly, thanks to Vincent and Jim, but I haven't been successful getting my first document produced. I'm trying to use one of Friedrich Leisch's examples, http://www.ci.tuwien.ac.at/~leisch/Sweave/example-1.Snw. I cut and pasted the text into a document sweaveexample.Rnw in Emacs. It seemed to be processed successfully with R:
> Sweave("sweaveexample.Rnw")

Writing to file sweaveexample.tex
Processing code chunks ...

You can now run LaTeX on 'sweaveexample.tex'
>

However, when I try to open the file sweaveexample.tex and process it with Latex in Emacs, I get this error:
ERROR: Missing \endcsname inserted.

The control sequence marked <to be read again> should not appear between \csname and \endcsname.

I've tried a variety of examples, but the error messages are the same.

Can anyone point out my errors or mistakes? I've pasted in the full files below. Thanks so much for your help and advice.

-Kevin

Kevin Zembower
Internet Services Group manager
Center for Communication Programs
Bloomberg School of Public Health
Johns Hopkins University
111 Market Place, Suite 310
Baltimore, Maryland 21202
410-659-6139



sweaveexample.tex:

\documentclass[a4paper]{article}

\title{Sweave Example 1}
\author{Friedrich Leisch}

\usepackage{C:/PROGRA~1/R/R-26~1.2/share/texmf/Sweave} \begin{document}

\maketitle

In this example we embed parts of the examples from the \texttt{kruskal.test} help page into a \LaTeX{} document:

\begin{Schunk}
\begin{Sinput}
> data(airquality)
> library(ctest)
> kruskal.test(Ozone ~ Month, data = airquality)
\end{Sinput}
\begin{Soutput}

        Kruskal-Wallis rank sum test

data: Ozone by Month
Kruskal-Wallis chi-squared = 29.2666, df = 4, p-value = 6.901e-06 \end{Soutput}
\end{Schunk}
which shows that the location parameter of the Ozone distribution varies significantly from month to month. Finally we include a boxplot of the data:

\begin{center}
\includegraphics{sweaveexample-002}
\end{center}

\end{document}



sweaveexample.Rnw:

\documentclass[a4paper]{article}

\title{Sweave Example 1}
\author{Friedrich Leisch}

\begin{document}

\maketitle

In this example we embed parts of the examples from the \texttt{kruskal.test} help page into a \LaTeX{} document:

<<>>=
data(airquality)
library(ctest)
kruskal.test(Ozone ~ Month, data = airquality) @
which shows that the location parameter of the Ozone distribution varies significantly from month to month. Finally we include a boxplot of the data:

\begin{center}
<<fig=TRUE,echo=FALSE>>=
boxplot(Ozone ~ Month, data = airquality) @
\end{center}

\end{document}



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