Some versions of Windows GDI have a superficially identical problem -- stroking a path is quadratic in the number of segments. The solution we used (in gdrawpolyline, in src/extra/graphapp/gdraw.c) was to split the drawing into pieces of length 1000, and that could be used here. It would be a simple modification to RQuartz_Polyline and RQuartz_Polygon, so please try it and let us know how you get on.
It would also have been helpful to (C-level) profile the call and find out where the time is being spent -- I expect it not to be in R at all but in Quartz. On Sun, 27 Apr 2008, Tomas Mikoviny wrote: > I found where is the problem, however have no solution for it right now. > To demonstrate (I have chosen 6000 to match my datasets size): > > x=seq(1:6000) > y=rnorm(6000) > plot(x,y) > > Absolutely no problem until now, everything is responsive, no lags. > > Problem appears when I insert parameter 'type': > > slowdown and unacceptable lag for "l", "o", "s" > plot(x,y, type="l") > plot(x,y, type="o") > ... > > however no problem at all (instantly plotted) for "p", "b", "c", "h" > plot(x,y, type="p") > plot(x,y, type="b") > ... > > Does anyone know possible reason for this behaviour. Once again, I use > clear install of R version 2.7.0 (2008-04-22). When I try the same > stuff with latest 2.6.2 version everything runs smoothly without any > problems. > > tomas > > > On 27 Apr 2008, at 10:49, Charles Hebert wrote: > >> Hi all, >> >> I've the same problem + the resizing of the window is really really >> slow... for all datasets. I'm running leopard 10.5.2 and the latest >> macOS R dmg. >> >> For all datasets. But when i use quartz() then plot, it seems ok >> (slow again but... usable). So right now, i use quartz(file, >> type="pdf")... >> >> Best regards, >> >> Charles > > _______________________________________________ > R-SIG-Mac mailing list > [email protected] > https://stat.ethz.ch/mailman/listinfo/r-sig-mac > -- 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 _______________________________________________ R-SIG-Mac mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-mac
