Kim MILFERSTEDT
2009-Oct-29 10:49 UTC
[R] changing default character size depending on settings for mfcol: How to scale font consistently?
Dear R-users, I would like to create pdf files with varying paper sizes. The paper size is determine by the number of plots that I squeeze on a page using par(mfcol). I also add text to each of these plots. I observed that depending on the number of plots per page, the default character size is changing, leading to differing font sizes in my plot annotations. I would like to use cex to scale the font size so that I obtain identical font sizes in my pdf, independent of the size of my page in the pdf. My question is, how do I find out the current default for character size so that I can calculate an appropriate scaling factor? Or are there any better alternatives? Below, I added an example code to produce three pdf files. Note that the red letters in the plot have different sizes, depending on the number of plots per page. Thank you very much in advance! Kim platform i386-pc-mingw32 arch i386 os mingw32 system i386, mingw32 status major 2 minor 10.0 year 2009 month 10 day 26 svn rev 50208 language R version.string R version 2.10.0 (2009-10-26) Example code test.data <- matrix(rnorm(300, 100, 25), nrow=3, ncol = 100, byrow = TRUE) x <- seq(1,100) how.many.to.plot <- c(1,2,3) for(i in 1:length(how.many.to.plot)) { test.data.red <- matrix(test.data[1:how.many.to.plot[i],], nrow =how.many.to.plot[i], ncol = 100) pdf.name <- paste("test", how.many.to.plot[i], ".pdf", sep="",collapse="") pdf(file= pdf.name, width = 7, height=(7/5)*nrow(test.data.red)) par(mar=c(0, 0, 0, 0.0), cex = 1, oma = c(0,0,0,0), mfcol= c(nrow(test.data.red),1)) for(j in 1:(nrow(test.data.red))) { plot( x, test.data.red[j,], ylim = c(0, max(test.data.red[j,])), type = "l", xaxt = "n", yaxt = "n", ) text( x = 30, y = 75, labels = LETTERS[j], cex = 1.6, col ="red" ) } dev.off() } -- ________________________________________________ Kim Milferstedt, PhD Postdoctoral Researcher INRA Laboratoire de Biotechnologie de l'Environnement Avenue des Etangs F-11100 Narbonne France phone: (+33) 04 68 42 51 87 fax: (+33) 04 68 42 51 60 email: milferst at supagro.inra.fr
Jim Lemon
2009-Oct-29 22:11 UTC
[R] changing default character size depending on settings for mfcol: How to scale font consistently?
On 10/29/2009 09:49 PM, Kim MILFERSTEDT wrote:> ... > My question is, how do I find out the current default for character > size so that I can calculate an appropriate scaling factor? Or are > there any better alternatives? >Hi Kim, You can get the current scaling with: par("cex") Jim
Maybe Matching Threads
- mathematical expression in varnames of lattice parallel plot
- R for copying and pasting selected image files?
- removing a specific number of digist from a character string
- update index in "for" statement during calculation
- rgl.postscript generating pdf: floating xlab, font size, transparency