R help - Sep 2009 - Coordinates of the current plot

Hi,
Is is possible to obtain/ get coordinates of the current graphics? I am using
plot function for hclust object and I want to add some additional graphics
but I cannot figure out what  ylim and xlim is used for actual ploting of
tree. I know that I can probably used ploting of dendrogram instead but I
need to use hclust class since it better manage the huge amount data I
p[lotting. thanks for help
Petr Novak

On 9/22/2009 11:04 AM, petr at orbit.umbr.cas.cz wrote:
> Hi,
> Is is possible to obtain/ get coordinates of the current graphics? I am
using
> plot function for hclust object and I want to add some additional graphics
> but I cannot figure out what  ylim and xlim is used for actual ploting of
> tree. I know that I can probably used ploting of dendrogram instead but I
> need to use hclust class since it better manage the huge amount data I
> p[lotting. thanks for help
See ?par.  You want par("usr").

Duncan Murdoch