I also see this. It seems that the 100th point plotted is not connected to the 101st, regardless of the actual data values. A more visually dramatic example is x<-seq(0,8*pi,length=102) plot(x,cos(x),type="l") which makes it clear that the problem isn't just something like antialiasing. The gap doesn't appear in pdf(). -thomas Thomas Lumley Assoc. Professor, Biostatistics [EMAIL PROTECTED] University of Washington, Seattle ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel