[R] Tick marks for abline

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Thu Oct 26 19:52:38 CEST 2000

Erin Hodgess <hodgess at uhddx01.dt.uh.edu> writes:

> Dear R People:
> I am drawing graphs for a College Algebra class. I would like to have
> the x and y axes, along with the lines that I am plotting.  So I leave
> off the axes, and use xlim and ylim.  Then I add my abline(v=0).
> However, I would like to have tick marks on the abline.  How would I do
> that, please?

Here's a starting point:

 axis(1, pos=0)
 axis(2, pos=0)

You probably want to leave off the markings at 0.0 there, but check
the help for axis() for things you can do. 

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
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