Thanks for the reponse Winston. Your chart (http://stdout.org/~winston/X/r-antialias/pch.html) illustrates my problem perfectly. I did experiment with Cairo, with no success in improving the display. In the blog post you linked to, the following comment appeared:
"If you don't have anti-aliasing on your system (and can't recompile R to enable it), you can use the poor-man's anti-aliasing trick: generate the graph in double the resolution, and display it at half the size." Does this mean that the standard Windows binary for R is not compiled with anti-aliasing enabled? Also, I have tried the trick of using larger graphics reduced in the browser, but I have found that the results look a little blurry. I am yet to produce a png plot on Windows that looks anything like as good as the ones produced on the Mac. Regards, Sean. On Sat, Jul 4, 2009 at 1:35 AM, Winston Chang<winstonchang2...@u.northwestern.edu> wrote: > On Thu, Jul 2, 2009 at 7:11 PM, Sean Carmody <seancarm...@gmail.com> wrote: >> >> I have been plotting the same charts using png on a Windows machine >> and on a Mac OSX and the quality of the resulting images, particularly >> in relation to the fonts, look far superior in the plots produced on >> the Mac. Is there any way I can enhance the quality of the plots >> produced on the Windows machine? I have also tried using win.metafile >> on the Windows machine and the quality looks the same as the png. The >> obvious solution would be to just use the Mac, but that's not an >> option in the office! >> >> I have been searching the archives on this topic to no avail (although >> I can vouch for the perspicacity of my choice of search terms), so any >> help would be greatly appreciated! > > Your issue probably has to do with antialiasing. See number 8 in this list: > http://blog.revolution-computing.com/2009/01/10-tips-for-making-your-r-graphics-look-their-best.html > You can supposedly work around it using the Cairo package and CairoPNG() > instead of png(), as shown here: > http://www.mailund.dk/index.php/2009/01/25/antialias-plotting-in-r-using-cairo/ > > However, in my experience, the fonts don't work right in Windows XP with > CairoPNG. You can see it in this chart I made using different rendering > methods on different platforms (scroll down to CairoPNG). > http://stdout.org/~winston/X/r-antialias/pch.html > I posted about a related issue a little while back but never got a > response.... hopefully someone else will be able to explain how to make it > work! > -Winston > -- Sean Carmody The Stubborn Mule http://www.stubbornmule.net http://twitter.com/seancarmody ______________________________________________ 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.
