[R] xyplot with grid?

Gav Wood news at gavofyork.fastmail.fm
Wed May 9 21:40:28 CEST 2007

Gabor Grothendieck wrote:
> Add the argument
>    type = c("p", "g")
> to your xyplot call.

So what's the easiest way to place a line at x=3 (ala "abline(v=3)") to 
the graph? After calling the xyplot call, the panel.* functions seem to 
work only in device coordinates.

Thanks for the help,


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