[R] Sweave and \Sexpr{}

Eric R. ericr at mcs.st-and.ac.uk
Thu Feb 5 10:03:30 CET 2009


Felipe:

See Leisch's FAQ A18.  

http://www.statistik.lmu.de/~leisch/Sweave/FAQ.html#x1-20000A.18

You likely have R2HTML loaded (likely because you are using Tinn-R) and that
causes some difficulties for Sweave that are easily solved as described in
the FAQ.



Felipe Carrillo wrote:
> 
> Hi: 
> I am trying to create a dynamic latex table using \Sexpr{} but it's not
> evaluating it. I also tried the example below without Sweave and also
> fails. I have also copied the Sweave.sty to my working directory but
> nothing seems to work. Do I need to have certain package in order to run
> \Sexpr{}?
> 
> \documentclass[a4paper]{article}
> \usepackage{C:/R/R-2.8.1/share/texmf/Sweave}
> \begin{document}
> 
> <<echo=false,results=hide>>=
> library(lattice)
> library(xtable)
> data(cats, package="MASS")
> @ 
> 
> \section*{The Cats Data}
> 
> 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).
> 
> A linear regression model of heart weight by sex and gender can be
> fitted in R using the command
> <<>>=
> lm1 = lm(Hwt~Bwt*Sex, data=cats)
> lm1
> @ 
> Tests for significance of the coefficients are shown in
> Table~\ref{tab:coef}, a scatter plot including the regression lines is
> shown in Figure~\ref{fig:cats}.
> 
> \SweaveOpts{echo=false}
> 
> <<results=tex>>=
> xtable(lm1, caption="Linear regression model for cats data.",
> label="tab:coef")
> @ 
> 
> \begin{figure}
>   \centering
> <<fig=TRUE,width=12,height=6>>=
> 
> print(xyplot(Hwt~Bwt|Sex, data=cats, type=c("p", "r")))
> @  
>   \caption{The cats data from package MASS.}
>   \label{fig:cats}
> \end{figure}
> \begin{center}
> \end{center}
> 
> \end{document}
> 
> 
> Felipe D. Carrillo  
> Supervisory Fishery Biologist  
> Department of the Interior  
> US Fish & Wildlife Service  
> California, USA
> 
> ______________________________________________
> 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.
> 
> 

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