[R] Tick marks for abline

[Peter Dalgaard BSA]

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:

 plot(0,0)     
 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  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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