[R] clicking on plot and recording XY coords

[jim holtman]

?locator

On Fri, Jun 20, 2008 at 11:25 PM, milton ruser <milton.ruser at gmail.com> wrote:
> Dear all,
>
> I need to run a interactive procedure where the user
> will need click on the screen (over a XY plot)
> and I need to record the XY coordinate which the
> user clicked. Roughly I wrote a short code below.
> You see that I suppose that the user will choose
> four coordinates inside the region of intersection
> between three segmentes. On each click, I would like to
> record the position clicked in a vector.
> Any help are welcome.
>
> Miltinho
> -----
> number.clicks<-4
> for (i in 1:number.clicks)
>  {
>  plot(0,0, type="n")
>  seg1<-arrows(-0.5,-1,0.5,0, col=1)
>  seg2<-arrows(0,-1,-0.3,0.3, col=2)
>  seg3<-arrows(0.2,-0.7,-0.5,0, col=4)
>  # here I would like click on PLOT
>  # and record de XY position
>  # before go to next aquisition
>  }
>
>        [[alternative HTML version deleted]]
>
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> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?