Hi Brian, Terribly sorry if I accidentally broke a rule. sessionInfo() produces the following:
> sessionInfo() R version 2.2.1, 2005-12-20, powerpc-apple-darwin7.9.0 attached base packages: [1] "methods" "stats" "graphics" "grDevices" "utils" "datasets" [7] "base" I cannot upgrade to the latest version of R, since I'm using OS X 10.3.9 (Panther) and the latest builds require 10.4.4 (Tiger) or greater. It's interesting to know that R version 2.4.0 contains a transparency bug, though - I'll ask IT Services to install the latest version of R on the G5 and see if that helps. Many thanks for all your help, -Matt On Fri Apr 27 12:58 , Prof Brian Ripley <[EMAIL PROTECTED]> sent: >The posting guide says > > For questions about unexpected behavior or a possible bug, you should, > at a minimum, copy and paste the output from sessionInfo() into your > message. > > If you are using an old version of R and think it does not work > properly, upgrade to the latest version and try that, before posting. > >[There is a known bug in 2.4.0 related to semi-transparency, fixed in >2.4.0. I would not have attempted to answer a question about 2.1.1, and >we do rely on people seeking free technical assistance doing their bit.] > > >On Fri, 27 Apr 2007, Matthew Neilson wrote: > >> Thanks for your fast response. >> >> I'm using R version 2.1.1 on OS X 10.3.9 to create the pdfs. I have tried >> viewing the pdf output in both Acrobat 6 and 7 (both display a white border >> around each polygon) as well as >> Preview (displays fine). I have emailed the pdf file to some correspondents >> running Windows, and they also see white borders when viewing with Acrobat >> (version unspecified). >> >> I have tried using R version 2.4.0 on a G5 machine (which I can access >> remotely) running OS X 10.4.8, but the resulting pdf renders incorrectly >> (i.e. with a white border around each >> polygon) in both Acrobat *and* Preview. So it would appear that the >> combination of R 2.1.1 and OS X 10.3.9 gives slightly better results - >> although plots still appear incorrect when >> printed or viewed in Acrobat. >> >> Unfortunately, I don't have access to a Windows machine to test this out. >> Even if I did, many of my scripts include various Unix system calls so I >> don't think that would be a viable >> solution. Could this be a bug in the OS X pdf driver? > >The R pdf() device is the same on all platforms. > >> Many thanks, >> >> >> -Matt >> >> >> >> On 27 Apr 2007, at 06:42, Prof Brian Ripley wrote: >> >>> What version of R, what OS, what version of Acrobat? >>> >>> I don't see this in 2.5.0 on Windows (using Acrobat 7: Acrobat does not >>> exist on Linux, AFAIK). And reading the PDF produced shows no sign of an >>> extra object for the border. >>> >>> On Fri, 27 Apr 2007, Matthew Neilson wrote: >>> >>>> Hey all, >>>> >>>> I'm trying to create a plot of two semi-transparent regions. The reason >>>> they need to be partially transparent is so that I can see if there's any >>>> overlap. Here's some example code: >>>> >>>> # BEGIN >>>> >>>> pdf(file="test.pdf",version="1.4") >>>> plot(0,0,type="l",ylim=range(-3,3),xlim=range(-1,5)) >>>> polygon(c(0,1,2,3,4,3,2,1,0), c(0,1,2,1,0,-1,-2,-1,0), col=rgb(1,0,0,0.5), >>>> border=NA) >>>> polygon(c(1,2,3,4,5,4,3,2,1), c(0,1,2,1,0,-1,-2,-1,0), col=rgb(0,0,1,0.5), >>>> border=NA) >>>> dev.off() >>>> >>>> # END >>>> >>>> The problem with this is that, despite setting "border = NA", I get a >>>> big white border surrounding each polygon!! Funnily enough, setting the >>>> alpha channel equal to 1 (as opposed to 0.5) *doesn't* give the border, >>>> but an alpha channel of 1 produces an opaque polygon! :S >>>> >>>> I have read the FAQ, and (unfortunately) turning off line-art smoothing >>>> does not give the desired effect. Furthermore, my pdfs print with a >>>> white border surrounding each transparent polygon. >>>> >>>> Now, here comes the really bizarre part. Whilst Adobe Acrobat displays >>>> the unwanted white border, Apple Preview respects the "border=NA" >>>> argument and shows the two diamonds as they are intended. However, >>>> opening up the pdf in Illustrator CS reveals that there is in fact a >>>> transparent (according to Illustrator) border *on top* of each diamond. >>>> Deleting these two borders (one for each polygon) and re-saving the pdf >>>> appears to correct the issue. So the obvious question is: how did the >>>> surrounding borders get there in the first place? A bug in the polygon >>>> function, perhaps? >>>> >>>> Does anyone have any ideas for preventing these unwanted borders around >>>> semi-transparent polygons (without having to resort to Illustrator)? Has >>>> anyone else even come across this problem? >>>> >>>> Many thanks, >>>> >>>> >>>> -Matt >>>> >>> >>> -- >>> Brian D. Ripley, [EMAIL PROTECTED] >>> Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ >>> University of Oxford, Tel: +44 1865 272861 (self) >>> 1 South Parks Road, +44 1865 272866 (PA) >>> Oxford OX1 3TG, UK Fax: +44 1865 272595 >> >> ______________________________________________ >> [email protected] 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. >> > >-- >Brian D. Ripley, [EMAIL PROTECTED] >Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ >University of Oxford, Tel: +44 1865 272861 (self) >1 South Parks Road, +44 1865 272866 (PA) >Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [email protected] 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.
