[R] Placing a Shaded Box on a Plot

[Greg Snow]

The locator() function can help you find coordinates of interest on an existing plot.

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Stephanie Cooke
> Sent: Friday, January 27, 2012 1:03 AM
> To: r-help at r-project.org
> Subject: [R] Placing a Shaded Box on a Plot
> 
> Hello,
> 
> I would like to place shaded boxes on different areas of a
> phylogenetic tree plot. Since I can not determine how to find axes on
> the phylogenetic tree plot I am not able to place the box over certain
> areas. Below is example code for the shaded box that I have tried to
> use, and the first four values specify the position.
> 
> rect(110, 400, 135, 450, col="grey", border="transparent")
> 
> Any suggestions on how to place a shaded box to highlight certain
> areas of a plot I would greatly appreciate.
> 
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