[R] changing pen mode [or adjusting for overlapping points?]

[Spencer Graves]

  plot(1:2, col=1:2)

Is this what you want?
Spencer Graves

Don Armstrong wrote:
> I'm ploting a rather large number of points [~24,000] in two series
> with slightly different distributions.
> 
> I would like to be able to effectively see where the two distributions
> overlap by setting the pen mode (or it's equivalent) to allow the
> overlapping portion to show up as a different color (or different
> shade).
> 
> Unfortunatly, I couldn't find an option in par or postscript that
> looks like it would be of use.
> 
> Ideas or suggestions?
> 
> 
> Don Armstrong
> 
> 
> 
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