\HeaderA{showTree}{Print Lisp-Style Representation of R Expression}{showTree}
\keyword{programming}{showTree}
\begin{Description}\relax
Prints a Lisp-style representation of R expression.  This can be
useful for understanding how some things are parsed.
\end{Description}
\begin{Usage}
\begin{verbatim}
showTree(e, write = cat)
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{e}] R expression.
\item[\code{write}] function of one argument to write the result.
\end{ldescription}
\end{Arguments}
\begin{Author}\relax
Luke Tierney
\end{Author}
\begin{Examples}
\begin{ExampleCode}
showTree(quote(-3))
showTree(quote("x"<-1))
showTree(quote("f"(x)))
\end{ExampleCode}
\end{Examples}

