Hi Ralf, I first create (or not) the figure as a separate file(s) and then use conditional LaTeX to display the existing file(s) (exactely where I want it/them to appear). This also works with png etc, but you'll have to specify the extensions. Just be careful if you change paths ... This will give something like:
<<label=condFig1,fig=T,include=F>>= wantToPlot <- TRUE if(wantToPlot) { pdf(file="fig1.pdf") plot(1:10) # watever you want to plot ... } @ bla .. bla .. bla .. bla .. \ifnum \Sexpr{as.numeric(exists(fig1.pdf))}>0 { \begin{figure}[!h] \includegraphics {fig1} %% fig1 \label{..} \end{figure} } \fi Wolfgang . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wolfgang Raffelsberger, PhD Laboratoire de BioInformatique et Génomique Intégratives IGBMC, 1 rue Laurent Fries, 67404 Illkirch Strasbourg, France Tel (+33) 388 65 3300 Fax (+33) 388 65 3276 wolfgang.raffelsberger (at) igbmc.fr ________________________________________ De : r-help-boun...@r-project.org [r-help-boun...@r-project.org] de la part de Ralf B [ralf.bie...@gmail.com] Date d'envoi : lundi 15 novembre 2010 18:49 À : r-help Mailing List Objet : [R] Sweave: Conditional code chunks? I have a code junk that produces a figure. In my special case, however, data does not always exist. In cases where data exists, the code chunk is of course trival (case #1), however, what do I do for case # 2 where the data does not exist? I can obviously prevent the code from being executed by checking the existence of the object x, but on the Sweave level I have a static figure chunk. Here an example that should be reproducible: # case 1 x <- c(1,2,3) # case 2 - no definition of variable #x <- c(1,2,3) <<echo=FALSE, results=hide, fig=TRUE>>= if(exists(as.character(substitute(meta.summary)))){ plot(x) } @ In a way I would need a conditional chunk or a chunk that draws a figure only if it was generated and ignores it otherwise. Any ideas? Ralf ______________________________________________ R-help@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. ______________________________________________ R-help@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.