[R] How to extract the upper xlim and ylim of my plot?

[Peter Alspach]

Tena koe Mark

?par

in particular usr parameter, accessible by par()$usr

HTH ....

Peter Alspach

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Mark Na
> Sent: Wednesday, 22 July 2009 9:04 a.m.
> To: r-help at r-project.org
> Subject: [R] How to extract the upper xlim and ylim of my plot?
> 
> Dear R-helpers,
> 
> I wish to place some text in a plot, at approx 10% of my 
> upper xlim and approx 90% of my upper ylim, i.e.
> 
> > plot(log(all$SR,10)~log(all$AREA,10))
> > text(.1*max(xlim),.9*max(ylim),"text to be placed")
> 
> (I know how to give absolute coordinates for text location, 
> but I wish to use relative coordinates).
> 
> My code (above) doesn't work because I don't know how to 
> properly extract the upper xlim and ylim values.
> 
> Does anyone know how I could extract the upper xlim and ylim 
> values (without using max(x-variable) or max (y-variable)...I 
> wish to keep this as general as possible and not point to the 
> original data.
> 
> Thanks in advance,
> 
> Mark
> 
> 	[[alternative HTML version deleted]]
> 
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