I had the same problem before and I think it has something to do with the
R2HTML package.
To take care of that problem simply sweave your rnw file like this:
Sweave("yourfile.Rnw",syntax="SweaveSyntaxNoweb")
and try Sexpr{} again.
Felipe D. Carrillo
Supervisory Fishery Biologist
Department of the Interior
US Fish & Wildlife Service
California, USA
----- Original Message ----
> From: Mike White <mikewhite....@btconnect.com>
> To: "r-help@r-project.org" <r-help@r-project.org>
> Sent: Tue, May 25, 2010 2:25:36 AM
> Subject: [R] Problem with Sweave not recognising \Sexpr{}
>
> I am trying to run the Sweave example at
> http://www.stat.uni-muenchen.de/~leisch/Sweave/Sweave-Rnews-2002-3.pdf
However,
> the \Sexpr{} code is not being evaluated, although the actual R code within
> the
> {} runs ok in R.
Below is part of the resulting .tex file. Can anyone
> help identify the cause? I am using R 2.10.1 on Windows XP.
Consider the
> \texttt{cats} regression example from Venables \& Ripley
(1997). The data
> frame contains measurements of heart and body weight
of \Sexpr{nrow(cats)}
> cats (\Sexpr{sum(cats$Sex=="F")} female,
\Sexpr{sum(cats$Sex=="M")}
> male).
Thanks
Mike
> White
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