[R-sig-ME] Identification of points in Scatter Plot

[C. E. Timothy Paine]

Dear shankar,
Assuming your data.frame is named "X",
try 
plot(X$X, X$Y)
text(X$X, X$Y, labels  = X$ID, pos = 1)

You may want to direct general questions like this to the "R-help" listserv.
Best wishes, 
tim


On Mar 17, 2011, at 4:07 PM, Shankar Lanke wrote:

> Dear All,
> 
> I am new to R blog.
> 
> I am unable to figure out how to identify specific or some points in XY
> scatter plot.
> 
> How to identify a point coordinates in R scatterplot.
> 
> For example I have couple of points which are away from the line of identity
> and I want to know the ID's or x,y coordinates of these points as shown in
> the below table.
> 
> There is an function  identify(X ,labels=DV) but there is an error executing
> it.
> ID  X    Y
> 1  0.5  0.4
> 1  0.2  0.1
> 1  1      2
> 1  4      5
> 2  2.5   3
> 2  3      4
> 2  0.5  0.4
> 2  0.2  0.1
> 2   1      2
> 2   4      5
> 2  2.5   3
> 2  3      4
> 3  0.5  0.4
> 3  0.2  0.1
> 3  1      2
> 3   4      5
> 3  2.5   3
> 3  3      4
> 
> -- 
> Regards,
> Shankar Lanke Ph.D.
> University at Buffalo
> Office # 716-645-4853
> Fax # 716-645-2886
> Cell # 678-232-3567
> 
> 	[[alternative HTML version deleted]]
> 
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______________________
C. E. Timothy Paine
Institut für Evolutionsbiologie und Umweltwissenschaften
Universität Zürich
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timothy.paine at ieu.uzh.ch
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