data.frame cannot be used in latex document with beamer class

[gangchen]

LaTeX codes:

 \documentclass[UTF8]{beamer}

 \begin{document}

 \begin{frame}
  \frametitle{test}
 %%begin.rcode
 % data.frame()
  %%end.rcode
  \end{frame}

  \end{document}

Processing command:

  knit("test.Rtex", encoding="UTF-8")

Compile command:

 xelatex test.tex

Error message:

 ! Illegal parameter number in definition of \beamer@doifinframe.
 <to be read again> 

  l.73 \end{frame}

[yihui]

That is not a problem of data.frame(), but a beamer problem: you have to use the [fragile] option when a frame contains verbatim code, e.g.

\begin{frame}[fragile]
\frametitle{test}
%%begin.rcode
% data.frame()
%%end.rcode
\end{frame}

[gangchen]

Thanks.

But it seems that some frames can work without [fragile] option.

[yihui]

Yes, they work when they do not contain verbatim code.

[ghost]

Thaks Yihui, you are a rock star!

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