Hi, Section 'Line Type Specification' in help(par) explains how you can do custom line types. For example:
plot(NA, xlim=c(0,1), ylim=c(0,1)); abline(h=1/2, col="blue", lwd=2, lty="88"); will draw a dashed line segment where the line is composed of 8 units of "on" (blue color) and 8 units of "off" (transparent), then repeated. Now I'd like to draw a second red line overlapping this one, but where the "gaps" are now red. Technically, I think the following would define that: abline(h=1/2, col="red", lwd=2, lty="0880"); that is 0 "on", 8 "off", 8 "on" (red color) and 0 "off", then repeated. However, zeros are not allowed (actually, why not?) Any suggestions to draw one red and one blue dashed lines that, if overlapping, the the overlapping segments will be blue, red, blue, red, ...? /Henrik ______________________________________________ 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.
