Identification of points in Scatter Plot

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The identify function should work, so something strange is happening, but without knowing more about what you did we can only guess.

You can help us help you by giving more details including the exact commands run to create the data, create the plot, and to run identify; the exact error message; if reasonable a version of the data that we can test (use the dput command) otherwise information on your data (use the str command).
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-sig-mixed-models-bounces at r-project.org [mailto:r-sig-mixed-
> models-bounces at r-project.org] On Behalf Of Shankar Lanke
> Sent: Thursday, March 17, 2011 9:08 AM
> To: r-sig-mixed-models at r-project.org
> Subject: [R-sig-ME] Identification of points in Scatter Plot
> 
> 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]]
> 
> _______________________________________________
> R-sig-mixed-models at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
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

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

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