LaTeX offers a verbatim environment. 

\begin{verbatim} 
This is maintained verbatim, Latex commands and environments are typeset 
as written without any processing. 
\end{verbatim}

Be sure to use the package verbatim.
---Joe



"Peter Dunn" <PDunn2@usc.edu.au> 
Sent by: r-help-bounces@r-project.org
01/28/2009 01:41 AM

To
"R Help" <r-help@r-project.org>
cc

Subject
[R] OT: Adding verbatim R code text into LaTeX documents: texttt; verb or 
url?






Hi all

I use Sweave extensively to mix R and LaTeX, and often have R code 
appearing in my LaTeX document.

Just a quick question then: What is the best way to add example of R 
commands into LaTeX in-line?  (That is, not using Sweave.)  For example, 
suppose I wish to place in my document this instruction:



...is done in R using the command  \verb|lm( y ~ var.one + var.two )| as 
follows:



I used  \verb  above, but I see three options:  \verb, \url (package url), 
or \texttt; there are probably others.

Here are my comments on these three:

- Using \texttt is OK, but it disappears my tildes and can hyphenate

- Using \verb is good, but it can hyphenate.

- Using \url is very good, but it:
* disappears my spaces; so for the above example, the spaces added for 
clarity are gone.
* Minor:  I like my verbatim text a little smaller (\small size), and 
change the font size for verbatim using 
\def\verbatim@font{\small\ttfamily} but \url seems to ignore this and 
appears larger than if I used \text or \verb.

Also, using \url often adds line-breaks mid-variable at the dots (for 
example, splitting  var.one  to have "var." on one line, and "one" on the 
next). I'm not sure this is a problem or not; here it is just an 
observation.

Ideally, one would want a LaTeX function, say \rcode{}, that displayed 
in-text using non-proportional font, kept tildes, kept spacing, uses my 
verb-font changes, and broke at sensible places for R.  (I don't want 
much, do I?)

So two questions:

* What do other people do?  Maybe there is a solution I have over-looked.

* Is there an easy solution?  I suppose writing such a command in LaTeX is 
possible, but there is strong evidence to reject the hypothesis that I 
would be able to write one.  Maybe one of the above choices are easily 
adopted.

If no easy solutions exist or emerge, I'm happy to run with \url.

Thanks again.

P.

Peter Dunn
Biostatistician
School of Health and Sport Science
Faculty of Science, Health and Education
University of the Sunshine Coast
 
Tel: +61 7 5456 5085
Fax: +61 7 5430 2896
Email: pdunn2@usc.edu.au
www.usc.edu.au


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