Hi Roger, Yes, that's the FAQ to which I was referring in my original email. Unfortunately, turning off smoothing for line art (as suggested in the FAQ) did not work for me.
Many thanks, -Matt On Fri Apr 27 12:32 , Roger Bivand <[EMAIL PROTECTED]> sent: >Matt: > >Is this by any chance a version of FAQ 7.36, which turned out to be the >smooth line art flag in Adobe Reader? > >Roger > > > >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? >> >> 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. >> > >-- >Roger Bivand >Economic Geography Section, Department of Economics, Norwegian School of >Economics and Business Administration, Helleveien 30, N-5045 Bergen, >Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 >e-mail: [EMAIL PROTECTED] > ______________________________________________ [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.
