I think you want the ?lines function. To connect a point (x,y) to the x-axis,
lines(x=c(x,x),y=c(y,0)) ...draws a line from that point to the x-axis. You may also want to specify pch=c(?,""),type="b" where ? is the original point type (which you don't want to "run over") and "" is the pch for theline on the axis. --Adam On Sun, 7 Sep 2008, Anny Huang wrote:
Hello, I want to know how to draw a line connecting each point to the x-axis perpendicularly (i.e. a vertical line). abline(v=...) seems not to work for my purpose, because it runs over the data point. Can anyone help? Thanks. Anny [[alternative HTML version deleted]] ______________________________________________ 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.