# [R] sweave question

Duncan Mackay mackay at northnet.com.au
Thu Feb 14 01:45:31 CET 2013

Hi

Dan is correct

The alternative is to use a chunk to create the plot
eg
<<reg3print, results=hide, echo=FALSE>>=
pdf("reg_tree-fig3.pdf", width = wid, height = hei)
plot(cal.tree,uniform=TRUE,compress=TRUE,margin=0.0)
text(cal.tree, all=TRUE,fheight=1.0,fwidth=1.0)
dev.off()
@

an call the file in the latex figure in the usual way

\begin{figure}[!h]
\centering
\includegraphics[width=...,%
clip=true,%
trim=0in 0in 0in 0in,%
keepaspectratio=true]%
{....reg_tree-fig3.pdf}
...
\end{figure}

Regards

Duncan

Duncan Mackay
Department of Agronomy and Soil Science
University of New England
Armidale NSW 2351
Email: home: mackay at northnet.com.au

At 09:50 14/02/2013, you wrote:
> > -----Original Message-----
> > From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> > project.org] On Behalf Of Mark Leeds
> > Sent: Wednesday, February 13, 2013 2:59 PM
> > To: r-help at r-project.org
> > Subject: [R] sweave question
> >
> > Hi Everyone: I was having trouble getting the plot size correct when
> > putting a plot in an sweave document. So, I searched on the internet
> > and I
> > found a clever solution where the person uses
> > the cat function to write latex code so he can include the cat code in
> > the
> > chunk and place the plot using width and height. The solution is here:
> > https://stat.ethz.ch/pipermail/r-help/2009-April/195094.html.
> >
> > But the solution uses a backslash before the ending quotes in the cat
> > statements  that might be windows relevant possibly ? I'm not sure
> > that part but I'm on linux and when I tried my way to mimic that
> > solution
> > in the latex/sweave code below ( I think it's the same solution but
> > without
> > the backslash on the closing quotes. I tried that also but got a
> > different
> > error ) , Sweave doesn't like the start of the includegraphics command.
> > The
> > error I get from Sweave is
> >
> > #=======================================================
> > Error:  chunk 9 (label = fig3)
> > Error : '\i' is an unrecognized escape in character string starting
> > "\i"
> > Execution halted
> > :~/research/equity/projects/tree_returns/report>
> > #=====================================================
> >
> > The code is below but if anyone is interested and thinks they need the
> > whole file to look at the problem, I can send it. I just didn't want to
> > send the whole file here. Definitely the error has to do with the chunk
> > below for sure ( even though it says chunk 9 because there is no chunk
> > 9
> > ).  Thanks a lot to anyone who can be bothered investigating because
> > I've
> > spent pretty much the whole day on this and think it's
> > time to surrender !!!!!!!!!! or atleast give up for now and come back
> > to it
> > with a fresher brain. Have a good night.
> >
> > # THE LATEX/SWEAVE CODE
> > #================================================================
> >
> > cal.tree is created in a previous chunk and that's fine.
> >
> > <<chunk08,label=fig3, fig=FALSE,result = tex>>=
> > wid <- 5
> > hei <- 5
> > pdf("reg_tree-fig3.pdf", width = wid, height = hei)
> > plot(cal.tree,uniform=TRUE,compress=TRUE,margin=0.0)
> > text(cal.tree, all=TRUE,fheight=1.0,fwidth=1.0)
> > dev.off()
> > cat("\begin{figure}[ht!]")
> > cat("\begin{center}")
> > cat("\includegraphics[width = ", wid, ", height = ", hei,
> > "]{reg_tree-fig3}")
> > cat("\end{center}")
> > cat("\caption{The resulting unpruned regression tree of the california
> > real
> > estate data}")
> > cat("\label{FIG:figthree}")
> > cat("\end{figure}")
> > @
> >
>
>Mark,
>
>I am not an sweave expert, but I think the problem is actually that
>you need to double all of your backslash characters that you
>actually want to write out as a backslash.  The error message says
>that it doesn't recognize the escape character '\i'.
>
>
>Dan
>
>Daniel J. Nordlund
>Washington State Department of Social and Health Services
>Planning, Performance, and Accountability
>Research and Data Analysis Division
>Olympia, WA 98504-5204
>
>
>______________________________________________
>R-help at r-project.org mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>and provide commented, minimal, self-contained, reproducible code.