R help - Jul 2003 - Add a legend to a pairs plot??

All, 
Can someone tell me if it is possible to add a legend to a plot produced
with pairs()? 

I have an example akin to plotting the iris data given in the pairs help
and would like to show what the symbols refer to somewhere. 

Thanks.

Toby.Patterson at csiro.au wrote:
> All, 
> Can someone tell me if it is possible to add a legend to a plot produced
> with pairs()? 
It is possible, but it depends on where you want the legend(s) to be 
placed. One for each variable (argument diag.panel helps inthis case)? 
Just one for the whole pairs() plot (Divide the plot or just plot the 
lower triangle and use the upper for a legend, e.g.)?

Uwe Ligges

> I have an example akin to plotting the iris data given in the pairs help
> and would like to show what the symbols refer to somewhere. 
> 
> Thanks.
> 
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