[R] Combining Sweave and fancyvrb

[Michael Friendly]

Andrew Ellis wrote:
> You cannot have \label in an S chunk, as R will not know what to do
> with it. Neither can you have \label in a verbatim environment, as it
> will simply be typeset verbatim.
> 
Actually, with your definition of Sinput

\DefineVerbatimEnvironment{Sinput}{Verbatim} {
     commentchar=@,
frame=lines, label=\textrm{\bf R code}, numbers=left,
framesep=10pt, fontshape=sl, commandchars=\\\{\}}

you can have \label{} in the verbatim environment. I haven't tried this 
but something like

<<>>=
help()   # \label{line1}
@

might work, and I believe there is a switch that suppresses the comments 
for Sweave

-Michael