An even more marked effect of x11() can be seen with scatter plots with large numbers of points (eg MvA microarray plots). I guess this is really taxing the antialiasing.
On my 667/G4 TiBook: > quartz() > system.time(plot(rnorm(10000), pch=".")) [1] 2.774 0.120 3.549 0.000 0.000 > x11() > system.time(plot(rnorm(10000), pch=".")) [1] 0.082 0.009 0.174 0.000 0.000 That's over a 30-fold speed hike with x11. Regards David On 11/11/06 06:56 stefano iacus wrote: > Once (in the original implementation of the device) it was possible > to set "antialias=FALSE" when opening quartz() to get reasonable > speed in drawing, but of course you loose the nice quartz antialias > effect, and get results similar to X11 or windows device. > > it seems that this option has no longer effect > >> quartz() >> system.time(example(heatmap)) > [1] 2.587 0.180 4.460 0.000 0.000 >> quartz(antialias=FALSE) >> system.time(example(heatmap)) > [1] 2.573 0.176 4.545 0.000 0.000 >> x11() >> system.time(example(heatmap)) > [1] 1.967 0.145 3.741 0.000 0.000 > > > Simon, have you time to check? > > stefano > > > On 11/nov/06, at 15:19, Paul Roebuck wrote: > >> On Sat, 11 Nov 2006, Klaus Thul wrote: >> >>> [SNIP] >>> A major advantage of the Mac is the Quartz graphics >>> device. Graphics quality on screen is much better and >>> it is possible to copy and paste graphics without >>> quality loss to other applications. >>> [SNIP] >> >> I agree with most of what he said here. I would note however >> that we routinely have to use the X11() device instead of >> quartz() device in R due to speed issues. I have code that >> would take several minutes drawing a heatmap using quartz >> device. One day I accidentally started X11 device instead >> and found the same code executed in about fifteen seconds. >> >> ---------------------------------------------------------- >> SIGSIG -- signature too long (core dumped) >> >> _______________________________________________ >> R-SIG-Mac mailing list >> [email protected] >> https://stat.ethz.ch/mailman/listinfo/r-sig-mac >> > > _______________________________________________ > R-SIG-Mac mailing list > [email protected] > https://stat.ethz.ch/mailman/listinfo/r-sig-mac -- Professor David Kipling Department of Pathology School of Medicine Cardiff University Heath Park Cardiff CF14 4XN _______________________________________________ R-SIG-Mac mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-mac
