FYI, there is also smoothScatter() in the 'geneplotter' package (part of the Bioconductor.org project).
/Henrik On Tue, May 13, 2008 at 5:08 AM, Prof Brian Ripley <[EMAIL PROTECTED]> wrote: > On Tue, 13 May 2008, Charles Plessy wrote: > > > > Dear list, > > > > I realised by chance when analysing a 1521862 × 8 matrix that plotting > > was much faster when using "." as the argument of `pch'. > > > > Why is that surprising? Drawing a small square is rather easy compared to > a circle, say. > > > > > I was just wondering if there were other ways to get this speed > improvement: it is otherwise quite difficult to explore such big matrices, > especially given that X11 redraws the plot whenever its window is > covered/uncovered by another window, or when I switch virtual desktops. > > > > That is a function of your X setup. R does ask for backing store to be > used, and so it seeems your setup is not doing so. Also, the type="cairo" in > X11() will repaint from a backing pixmap. > > You might want to contemplate better ways to visualize 1.5m points. It is > not clear what plot you are actually doing, but a density plot is likely to > be more informative (especially a 2D pairs plot of densities), or a hexbin > plot (from the BioC package or that name) or .... > > > > > > > > Best regards, > > > > -- > > Charles Plessy, > > Wakō, Saitama, Japan > > > > ______________________________________________ > > 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. > > > > > > -- > 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-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. > > ______________________________________________ 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.
