[R] 2d plot with modification of plotting symbol to indicate third dimension.

[Gabor Grothendieck]

On Wed, Jan 12, 2011 at 9:33 PM, John Sorkin
<jsorkin at grecc.umaryland.edu> wrote:
> I would like to plot 3-dimensional data on a two-dimensional scatter-plot.
> Is there a way I can automatically modify the plot symbol (e.g. changing size or color) to indicate the value of a third variable? E.g. How can I plot weight vs. age and indicate the value of muscle mass for each value weight-age pair by making the plot point proportional to the subject's muscle mass?

Check out:
http://flowingdata.com/2010/11/23/how-to-make-bubble-charts/

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