R help - Dec 2009 - Labeling plot points

Hi, all. I've been searching for a while to find out how to create an
scatterplot which would let a user interact with it, specifically by
hovering the mouse over a point and having a pop-up appear with data about
the point. The pop-up would disappear when the mouse moved away. I've
included a mock-up below.

I've found out how to use identify() to make a label appear when clicking a
point, but as far as I can tell that label text remains on the plot once
inserted. If pop-ups aren't supported in R, is there a way to make a text
label disappear when the mouse is clicked again? Are there other R graphic
libraries I should use for this kind of feature? Any pointers or sample code
would be appreciated.

Thanks,

Doug

http://n4.nabble.com/file/n960517/Untitled.bmp 
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There are 2 functions in the development version of the TeachingDemos package
(the version on R-forge, not CRAN yet) that do just what you describe.  The
functions are HWidentify which only works on windows machines and HTKidentify
which uses the tcltk package.

Hope this helps,

-- 
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 Doug
> Sent: Thursday, December 10, 2009 1:49 PM
> To: r-help at r-project.org
> Subject: [R] Labeling plot points
> 
> 
> Hi, all. I've been searching for a while to find out how to create an
> scatterplot which would let a user interact with it, specifically by
> hovering the mouse over a point and having a pop-up appear with data
> about
> the point. The pop-up would disappear when the mouse moved away. I've
> included a mock-up below.
> 
> I've found out how to use identify() to make a label appear when
> clicking a
> point, but as far as I can tell that label text remains on the plot
> once
> inserted. If pop-ups aren't supported in R, is there a way to make a
> text
> label disappear when the mouse is clicked again? Are there other R
> graphic
> libraries I should use for this kind of feature? Any pointers or sample
> code
> would be appreciated.
> 
> Thanks,
> 
> Doug
> 
> http://n4.nabble.com/file/n960517/Untitled.bmp
> --
> View this message in context: http://n4.nabble.com/Labeling-plot-
> points-tp960517p960517.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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