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using Sweave, how to save a plot in a given size

9 messages · Wolfgang Raffelsberger, Lore M, ONKELINX, Thierry +1 more

Wolfgang Raffelsberger
# 
Hi I do somthing like:

\SweaveOpts{prefix.string=proj1}

<<label=fig1,fig=T,include=F,width=8, height=12>>=
plot(1:10)
@

\begin{figure}
\includegraphics {proj1-fig1}           %% show
\label{..}
\end{figure}


Wolfgang


Lore M a ?crit :

  
    

      
      
    

  


  


      

    

    
1 day later

    

      
      

        
      

    

    

      
      

        


  

        

      ONKELINX, Thierry
    

    

      
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Dear Lore,

The easiest thing to do is to write a function that saves your plot to a file and generates the latex code.

<<label=fig1, fig=FALSE, result = tex>>=
pdf("fig1.pdf", width = wid, heigth = hei)
	plot(1:10)
dev.off()
cat("\begin{figure}\")
cat("\includegraphics[width = ", wid, ", height = ", hei, "]{proj1-fig1}\"}
cat("\end{figure}")
@

HTH,

Thierry

----------------------------------------------------------------------------
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology and quality assurance
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9500 Geraardsbergen
Belgium 
tel. + 32 54/436 185
Thierry.Onkelinx at inbo.be 
www.inbo.be 

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~ Roger Brinner

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-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Namens Lore M
Verzonden: woensdag 15 april 2009 13:46
Aan: wolfgang.raffelsberger at igbmc.fr; R Help
Onderwerp: Re: [R] using Sweave, how to save a plot in a given size


Yes it works, but I still have a problem.
The thing is that I know the dimensions of my plot but in the R code, not in the latex code. So I tried to do :

\SweaveOpts{prefix.string=proj1}

<<label=fig1,fig=T,include=F,width=\Sexpr{wid}, height=\Sexpr{hei}>>=
plot(1:10)
@

\begin{figure}
\includegraphics {proj1-fig1}           %% show
\end{figure}

But Latex doen't find the value of "wid" and "hei" when it creates the chunk code. But in the Latex code, it works and I do have the right value for "wid" and "hei".

Lore.

            

      
      
      
    

        

      
      
    

            

      
      
      
    

        
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      cls59
    

    

      
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Lo_Lo wrote:

            

      
      
      
    

        
Here's a couple of pointers for using figures in Sweave that might help you
out.

1. Only one plot per figure chunk- Sweave gets confused if you use more than
one *high level* plotting command.

2. Don't call the pdf() function- the Sweave driver does this automatically
if you set pdf=T in the \SweaveOpts or the << >> code chunk header.

3. Don't use cat() to output the \begin{figure}, \end{figure},
\includegraphics, ect. These will end up in the wrong place.

            

      
      
      
    

        
your .Rnw file:

\begin{figure}[h]
\centering

% Replace width and height with whatever dimensions you need. Leave them as
bare numbers
% i.e. 5 not 5in.
<<fig1,echo=F,fig=T,pdf=T,width=5,height=5>>=
plot(1:10)
@
% You can put a // here to cause the figures to separate onto two lines.
<<fig2,echo=F,fig=T,pdf=T,width=5,height=3>>=
plot(1:10)
@
% It is very important that all code chunks have different names! I.e.
<<fig1>>, <<fig2>> ect.
\end{figure}

The result of running Sweave on filename.Rnw will be:

\begin{figure}[h]
\centering
\includegraphics{filename-fig1}
\includegraphics{filename-fig2}
\end{figure}

Hope this helps!

-Charlie

-----
Charlie Sharpsteen
Undergraduate
Environmental Resources Engineering
Humboldt State University