[R] Identify and plotting symbols. [SEC=UNCLASSIFIED]

[Crombie, Joe]

Or maybe:

> while(length(ind <- identify(x,y,n = 1, plot = F)))
>   points(x[ind], y[ind], pch = 19)

(highlights each point as you select it, until you click _stop_)

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Crombie, Joe
Sent: Thursday, 20 September 2007 2:11 PM
To: r-help at stat.math.ethz.ch
Subject: Re: [R] Identify and plotting symbols. [SEC=UNCLASSIFIED]

Rolf turner wrote:

>I have been trying, unsuccessfully, to use identify() to (simply) 
>return a list of the indices of points clicked on and overplot (with 
>say a solid dot) each clicked-on point so that I can see where I've 
>been.  I.e. I don't want to see the indices printed on the screen; I
just want the points I've already selected to be highlighted.
>
>I tried
>
>	ind <- identify(x,y,labels=rep("\021",length(x)),offset=0)


Why not:

ind <- identify(x,y, plot = F)
points(x[ind], y[ind], pch = 19)

Cheers  Joe



Joe Crombie
 
Information and Risk Sciences
Bureau of Rural Science
Canberra  Australia
 
p: +61 2 6272 5906
e: joe.crombie at brs.gov.au

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