Message-ID: <BCF6EAB6-0881-4EB0-BF0A-D6675D42A5DB@gmail.com>
Date: 2011-01-14T00:23:09Z
From: jim holtman
Subject: 2d plot with modification of plotting symbol to indicate third dimension.
In-Reply-To: <4D2E1E3D020000CB0007DC58@medicine.umaryland.edu>
have you taken a look at the hexbin package? 'cex' , 'pch' & 'col' will let you make the changes
Sent from my iPad
On Jan 12, 2011, at 21:33, "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)
>
> Confidentiality Statement:
> This email message, including any attachments, is for th...{{dropped:6}}
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.