[R] Help with scatter plot

[Greg Snow]

Probably easiest using the segments function.

-- 
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 A Ezhil
> Sent: Tuesday, May 11, 2010 12:45 PM
> To: r-help at r-project.org
> Subject: [R] Help with scatter plot
> 
> Dear All,
> 
> I would like to add the mean line in the scatter plot by groups. I have
> plotted (X.val is 3 groups: 0, 1, 2): plot( Y ~ X.val). How can I add
> mean/median line (horizontal) for each group on the scatter plot?
> 
> Thanks in advance.
> 
> Kind regards,
> Ezhil
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.