[Not sure if I should post this here, or on a another list, but will try
here first...]
For a book I'm writing using knitr .Rnw files, I would like to use
\code{} to mark
*all* R code, without having to escape special characters that appear in R
names, formulas, etc.
In the past, I've use the LaTeX definition of \code{} in the test
file below, without problems.
However, in the context of my book project,
\code{y ~ (A + B)^2} fails, and I'm forced to use \verb|y ~ (A + B)^2|,
or for other cases explicitly escape the special characters, as
in \code{str\_length()} or \code{Arthritis\$sex}.
Below is a test file that *works*. What I don't know is how to find out why
it doesn't work in the context of my book project.
--- begin code-test.tex ---
\documentclass{article}
\usepackage{url}
\makeatletter
\newcommand\code{\bgroup\@makeother\_\@makeother\~\@makeother\$\@makeother\^\@codex}
\def\@codex#1{{\normalfont\ttfamily\hyphenchar\font=-1 #1}\egroup}
\makeatother
\begin{document}
Testing use of code fragments with special characters without
having to escape them.
\begin{itemize}
\item Formulas--
code: \code{y ~ (A + B)^2};
verb: \verb|y ~ (A + B)^2|;
url: \url{y ~ (A + B)^2}
\item Underscored names--
code: \code{str_length()};
verb: \verb|str_length()|;
url: \url{str_length()}
\item \$ names--
code: \code{Arthritis$sex};
verb: \verb|Arthritis$sex|;
url: \url{Arthritis$sex}
\end{itemize}
\end{document}
--- end code-test.tex
--
Michael Friendly Email: friendly AT yorku DOT ca
Professor, Psychology Dept. & Chair, Quantitative Methods
York University Voice: 416 736-2100 x66249 Fax: 416 736-5814
4700 Keele Street Web: http://www.datavis.ca
Toronto, ONT M3J 1P3 CANADA
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