See ?rgb and its alpha argument, for example. Uwe Ligges
Markus Loecher wrote: > Dear R graphics experts, > Do you know of any way of plotting semi-transparent points in R ? > I face this problem any time I want to e.g. plot thousands of points > that belong to two or three classes which I color code. > With the default opaque colors, the plotting order matters and > basically the points I plot last completely dominate the picture. I > would much rather have the overlaying points mix in color.. > > Thanks a lot, > Markus > > ______________________________________________ > 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.
