Perhaps you've not read FAQ: http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-do-lattice_002ftrellis-graphics-not-work_003f
-- David
On Oct 15, 2009, at 10:18 AM, Paul Evans wrote:
Hi, I was trying to make a graph using trellis, and my code is: ----------------------------------------------------------------- library(lattice) makeGraph <- function(){ trellis.device() tbg <- trellis.par.get("background") tbg$col <- "white" trellis.par.set("background",tbg) # Test Data mfr <- matrix(sample(1:100,50,replace=T),ncol=2) mfr <- cbind(mfr,c(rep(1,12),rep(2,13)))mfr <- cbind(mfr,c(rep("All",6),rep("Reduced",6),rep("All", 7),rep("Reduced",6)))colnames(mfr) <- c("PVAL","POSITION","CHR","METHOD") mfr <- as.data.frame(mfr) pdf(file='test.pdf') op <- par(no.readonly=TRUE)xyplot(as.numeric(as.vector(PVAL)) ~ as.numeric(as.vector(POSITION)) | CHR, data = mfr, groups = METHOD, ylab = "pval", xlab = "position",type="p",col=c("green","red") ) par(op) dev.off() } makeGraph() _______________________________________________________However, when I execute the code I don't get the graph. Although a pdf is generated, it is only 1 KB and when I try to open the pdf a message comes up that says there are no pages in the pdf. Interestingly, if I take the code (i.e. from line 'trellis.device()' to line 'dev.off') out of the function call and execute it, the pdf is generated just fine.What am I doing wrong? thanks! __________________________________________________ [[alternative HTML version deleted]] ______________________________________________ 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.
David Winsemius, MD Heritage Laboratories West Hartford, CT ______________________________________________ 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.
