# Re: [R] Insert R code in LaTeX document

From: Marc Schwartz <MSchwartz_at_mn.rr.com>
Date: Sun 17 Sep 2006 - 15:30:47 GMT

On Sun, 2006-09-17 at 16:45 +0200, Alexandre Depire wrote:
> Hello,
> i would like to insert R code in LaTeX document.
> I see something about the 'listings' package, but i would like if it is the
> best way and if it is possible to use the command \include{programme.R}.
> I have the following solution but it doesn't work with \include and \input
>
> ======
> LaTex
> ======
>
> main.tex
> ------------------
> \documentclass{report}
> \usepackage{listings}
>
> \begin{document}
> \include{annexe}
> \end{document}
>
> annexe.tex
> ---------------
> The code is:
> \lstset{language=R}
>
> #\include{} or \input or direct code ???
>
> R code
> ========
> # test
> rm(list=ls())
> x<-1:10
> mean(x)

Depending upon how much functionality you actually need, using the 'verbatim' environment may be easier:

\begin{verbatim}
R Code Here
\end{verbatim}

Then you don't need the rest of the LaTeX packages and associated code. The verbatim environment will use a monospace font by default. It is available by default in LaTeX, but you can also load the verbatim package (\usepackage{verbatim}) for a better implementation. The verbatim environment also provides a \verbatiminput{FileName} command that will enable you to insert a text file that will automatically be put in a verbatim environment:

\verbatiminput{FileName.R}

The listings package provides a lot of other functionality such as syntax highlighting, line numbers and so forth. I presume, given what you have above, that you have already looked at the manual for the package. If not and you are mimicking some online examples, then you might want to review it:

In either case, if you have an external file, you don't want to use \include, as that is for .tex files specifically. The file argument is the base name of the file only, without the extension and .tex is presumed.

Thus, you want to use \input, where you can specify the full FileName.R as the argument:

\input{FileName.R}

If you just have a small amount of R code to include, then just put it in the body of your main .tex file and you don't have to worry about multiple files or using \input, etc.

HTH, Marc Schwartz

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