Perhaps \code{} was redefined somewhere in your book project (the
document class, certain packages, ...). Can you try to minimize your
project and track down the problem? e.g. remove the body, keep the
preamble, and use only one instance of \code{something} in the body.
It is difficult to see what could be wrong with an example that works.
Regards,
Yihui
--
Yihui Xie xieyi...@gmail.com
Web: http://yihui.name
On Fri, Jan 3, 2014 at 2:09 PM, Michael Friendly frien...@yorku.ca wrote:
[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 StreetWeb: http://www.datavis.ca
Toronto, ONT M3J 1P3 CANADA
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