\begin{Schunk}
\begin{Sinput}
 head(dat, 10)
\end{Sinput}
\begin{Soutput}
            x1         x2          y x3 x3f
1   0.04308983 -0.8373452 -0.3461347  0  lo
2   0.26042677  0.1869587 -0.1634261  1 med
3  -1.27029419  0.6448636  0.6919094  2  hi
4  -1.35175600  1.7507298  0.7995129  0  lo
5   1.80028444 -0.4759012  1.6761407  1 med
6   1.88627714 -1.2192776  1.7799701  2  hi
7  -1.34221493  1.0640451 -0.4041325  0  lo
8  -1.37435358 -0.8777185 -0.2136798  1 med
9   1.50847983  1.9537122 -4.9849412  2  hi
10 -0.38709828 -1.0223294 -0.4816288  0  lo
\end{Soutput}
\end{Schunk}
