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

Gabor Grothendieck ggrothendieck at gmail.com
Thu Jan 13 18:18:21 CET 2011

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?

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tel: 1-877-GKX-GROUP
email: ggrothendieck at gmail.com

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