hi gavin---I am not even sure that it is a cairo bug, much less do I know about the details where it sits. for all I know, it could be an Apple problem. the "possible bug report" was not only for the cairo package (what's the difference between a package and a library? in my user R code, I invoke it as library(cairo)), but also for others who may use it and be surprised when they run into the same issue, wondering if it is their code, or a more general issue..
/iaw ---- Ivo Welch (ivo.we...@gmail.com) On Wed, Aug 17, 2011 at 5:18 AM, Gavin Simpson <gavin.simp...@ucl.ac.uk> wrote: > On Tue, 2011-08-16 at 17:46 -0700, ivo welch wrote: >> I think I found a bug in the Cairo library, plus weird behavior in >> both the Cairo and the normal pdf device. The baseline of the spades >> symbol seems to be off. This is easier to show than it is to explain. >> The problem does not appear in the normal pdf device, which is why I >> am guessing this is a Cairo bug. moreover, I cannot figure out why >> three of the card symbols seem to be transparent, but the fourth is >> not. this is the case for both the Cairo and the ordinary pdf >> devices. >> >> I thought I would report it to the R wizards on this group... > > Why? One is expressly asked to address such problems with the package > maintainer(s), especially if you feel there is a bug in the package. > > And whilst Martin M is potentially indisposed at UseR! 2011, I will > mention that it is a *package* not a library when you refer to the R > package Cario. If you had identified a bug in the Cairo *library* you > should be reporting it upstream to the Cairo people: > http://www.cairographics.org/ > > G > >> library(Cairo) >> >> clubs <- expression(symbol('\247')) >> hearts <- expression(symbol('\250')) >> diamonds <- expression(symbol('\251')) >> spades <- expression(symbol('\252')) >> csymbols <- c(clubs, diamonds, hearts, spades) >> >> CairoPDF(file = "cardsymbols.pdf") >> >> plot( 0, xlim=c(0,5), ylim=c(0,2), type="n" ) >> clr <- c("black", "red", "red", "black") >> for (i in 1:4) { >> hline <- function( yloc, ... ) for (i in 1:length(yloc)) lines( >> c(-1,6), c(yloc[i],yloc[i]), col="gray") >> hline(0.9); hline(1.0); hline(1.1); hline(1.2) >> text( i, 1, csymbols[i], col=clr[i], cex=5 ) >> text( i, 0.5, csymbols[i], col=clr[i] ) >> } >> >> dev.off() >> >> >> >> ---- >> Ivo Welch (ivo.we...@gmail.com) >> >> ______________________________________________ >> 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. > > -- > %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% > Dr. Gavin Simpson [t] +44 (0)20 7679 0522 > ECRC, UCL Geography, [f] +44 (0)20 7679 0565 > Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk > Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ > UK. WC1E 6BT. [w] http://www.freshwaters.org.uk > %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% > > ______________________________________________ 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.
