abline(h=0) On Thu, Mar 15, 2012 at 1:05 PM, Michael <comtech....@gmail.com> wrote: > How to add grid lines at specific position to a plot? > > Hi all, > > [Disclaimer: I have done extensive and intensive searching on Google and > asked around but couldn't find a solution to this problem. > Please help me instead of just pointing out how simple and stupid my > question is. God bless good folks! Thanks!] > > This is a headache for me and I have been struggling with this for a while. > > With an existing plot, how can I add a horizontal grid line at vertical > location 0 (just need 1 grid line)... > > I can certainly draw such a line myself using "lines". > > However, that will impact my legends because that also counts as a line. > But we wouldn't want a grid line to be counted as a line... > > Could anybody please help me? > > Thanks! >
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