2d plot with modification of plotting symbol to indicate third dimension.
Google on "R Graph Gallery" to find examples with code. You can also almost certainly RSiteSearch() on appropriate keys to find a pre-existing function (which someone may provideyou on the list). Also: ?symbols -- Bert On Wed, Jan 12, 2011 at 11:19 AM, 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?
Thanks,
John
John David Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology
Baltimore VA Medical Center
10 North Greene Street
GRECC (BT/18/GR)
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing)
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