\Header{bquote}{Partial substitution in expressions}
\keyword{programming}{bquote}
\keyword{data}{bquote}
\begin{Description}\relax
An analogue of the LISP backquote macro.  \code{bquote} quotes its
argument except that terms wrapped in \code{.()} are evaluated in the
specified \code{where} environment.\end{Description}
\begin{Usage}
\begin{verbatim}
bquote(expr, where = parent.frame())
\end{verbatim}
\end{Usage}
\begin{Arguments}
\begin{ldescription}
\item[\code{expr}] An expression 
\item[\code{where}] An environment 
\end{ldescription}
\end{Arguments}
\begin{Value}
An expression\end{Value}
\begin{SeeAlso}\relax
\code{\Link{quote}}, \code{\Link{substitute}}\end{SeeAlso}
\begin{Examples}
\begin{ExampleCode}
a<-2

bquote(a==a)
quote(a==a)

bquote(a==.(a))
substitute(a==A, list(A=a))

plot(1:10,a*(1:10), main=bquote(a==.(a)))
\end{ExampleCode}
\end{Examples}

