Andrew Collier <collierab <at> gmail.com> writes: > i am sure that this is a trivial question but i have not been able to > find an answer by searching the mailing lists. i want to plot points on > a graph, joined by lines. the command that i am using is > > points(x, y, type = "b", pch = 21) > > this plots nice open circles at the data points and draws lines between > them. however, the lines do not come all the way up to the edge of the > circles but stop some small distance away so that there is an empty > "margin" around the circles. is there a way to get rid of this margin? > my first guess was that there would be an option to par() but i did not > find anything there. any suggestions would be appreciated.
Does type="o" do what you want? (See ?plot ) However, this actually overplots (which would be OK with filled point types, or if you don't care if you have lines running across your open points) -- it doesn't draw the line "up to the edge of the point". It looks like the size of the spacing is hard-coded at a fairly deep level: in plot.c, within the do_plot_xy function, there is a spacing factor which seems to be encoded as "half the width of standard character in the current plotting coordinates". Ben Bolker ______________________________________________ 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.
