\usepackage{ Sweave }

\usepackage{color}%
\definecolor{highlightBg}{rgb}{0.949019607843137,0.949019607843137,0.949019607843137}
\definecolor{highlightBorder}{rgb}{0,0,0}
\newenvironment{Hinput}%
{}%
{}%
\newenvironment{Houtput}%
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\newsavebox{\highlightbox}%
\newenvironment{Hchunk}%
{%
\vspace{0.5em}\noindent\begin{lrbox}{\highlightbox}%
\begin{minipage}[b]{.9\textwidth}%
}%
{%
\end{minipage}%
\end{lrbox}%
\fcolorbox{highlightBorder}{highlightBg}{\usebox{\highlightbox}}%
\vspace{0.5em}}%


\usepackage{color}%
 
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