[R] Scatterplot question

[David Winsemius]

On Aug 27, 2010, at 2:16 PM, ashz wrote:

>
> Hi,
>
> I have two XY datasets (e.g., longitude  and concentrations) who  
> share the
> same X scale. How can I make a simple scatterplot which will combine  
> them
> both with different colors for the two Y groups? (plot and xyplot  
> solutions
> are fine with me).
>

Base graphics:
?points

Lattice:
?panel.points

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> and provide commented, minimal, self-contained, reproducible code.
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-- 
David Winsemius, MD
West Hartford, CT