Problem with Sweave not recognising \Sexpr{}

I think I have solved the problem. In the Sweave manual it mentions that 
problems may occur after loading the R2HTML package.  I have not 
recently loaded this package but the proposed solution to problems 
caused by R2HTML also solves my problem with the evaluation of R code in 
\Sexpr. It seems that it is necessary to set the syntax option in the 
Sweave function as follows
     Sweave(..., syntax="SweaveSyntaxNoweb")
  although I am not sure why this is required.
Mike

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

?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.diu at btconnect.com>
To: "r-help at r-project.org" <r-help at 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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href="mailto:R-help at r-project.org">R-help at r-project.org mailing list
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https://stat.ethz.ch/mailman/listinfo/r-help

PLEASE do read the posting

guide http://www.R-project.org/posting-guide.html

and provide commented,

minimal, self-contained, reproducible code.

What other packages do you have loaded?  Sometimes things interfere with each other.  Also, what version, os, etc are you working with? (the info asked for in the posting guide).

Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Mike White
> Sent: Tuesday, May 25, 2010 3:26 AM
> To: r-help at r-project.org
> 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
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.