[R] how can I find actual axis limits for an existing plot?

Eik Vettorazzi E.Vettorazzi at uke.uni-hamburg.de
Fri Mar 20 18:21:29 CET 2009

see ?par
You  are probably interested in par("usr")

Mark Borowsky schrieb:
> I would like to query an existing plot to learn the actual x and y 
> limits of the plottable area.  Is this possible?  I can discover the 
> extreme tick mark locations but not the actual plot area limits.  
> Setting the limits with ylim will not help in this case because I am 
> overplotting an existing plot with a separate function, and I don't 
> want my end-user to have to pass parameters around.
> Thanks,
> Mark
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