[R] questions on adding reference line?

Prof Brian Ripley ripley at stats.ox.ac.uk
Sun Nov 19 09:04:59 CET 2006

Your example is incomplete (what is x?), but axis(1, at=0.5) may be what 
you are looking for.

On Sun, 19 Nov 2006, zhijie zhang wrote:

> Dear Ruser,
>  I use abline() function to add the reference line successfully, but i
> can't display the values corresponding to the reference line on the x/y
> axis, anybody knows how to display it?
> *My simulated  programs:*
> y<-rnorm(50)
> plot(x,y)
> abline(v=0.5)  *#my question is how to display x=0.5 in the x axis?*
> Thanks in advance.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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