\begin{Schunk}
\begin{Sinput}
   x <- c("Y","N","Y","Y","F","N")
  is.factor(x)
\end{Sinput}
\begin{Soutput}
[1] FALSE
\end{Soutput}
\begin{Sinput}
  is.character(x)
\end{Sinput}
\begin{Soutput}
[1] TRUE
\end{Soutput}
\end{Schunk}
