\begin{Schunk}
\begin{Sinput}
 ## An ordered-factor avariable in R should look like
 class(hbsc$depre1_o)
\end{Sinput}
\begin{Soutput}
[1] "ordered" "factor" 
\end{Soutput}
\begin{Sinput}
 levels(hbsc$depre1_o)
\end{Sinput}
\begin{Soutput}
[1] "Never"     "Seldom"    "Sometimes" "Often"     "Always"   
\end{Soutput}
\begin{Sinput}
 str(hbsc$depre1_o)
\end{Sinput}
\begin{Soutput}
 Ord.factor w/ 5 levels "Never"<"Seldom"<..: 2 2 3 3 2 3 1 3 1 1 ...
\end{Soutput}
\end{Schunk}
