\begin{Schunk}
\begin{Sinput}
  rownames(dat)
\end{Sinput}
\begin{Soutput}
 [1] "1"  "2"  "3"  "4"  "5"  "6"  "7"  "8"  "9"  "10" "11" "12" "13" "14" "15" "16" "17" "18" "19"
\end{Soutput}
\end{Schunk}
