[R] Boxplot graphic

S Ellison S.Ellison at LGCGroup.com
Wed Jul 25 15:10:12 CEST 2012


Probably the simplest answer is to google 'label boxplot outliers in R'. I found half a dozen solutions, (one of them my own, but that doesn't quite answer your question).

Adding names to a series of data can be as simple as saying
names(x) <- paste("x", 1:length(x))

After that, the solutions google finds answer the question.

One tip: If you want to _replace_ points with names, plot the boxplot with pch=NA (eg
bx <- boxplot(x~g, pch=NA)
to get the boxplot without outliers but with space for them, and then use text(bx$group, bx$out, ...) or similar to put the names in. If you want boxplot to return names, though, you will need to use a modified boxplot function. The first answer Google returns is one such.

S Ellison

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of phillen
> Sent: 25 July 2012 12:27
> To: r-help at r-project.org
> Subject: [R] Boxplot graphic
> 
> Dear R-users!
> 
> I boxplotted some data. the class of the data is numeric. 
> There are some outliers and I would like to see their names 
> in the graphic. So, instead that the data points of the 
> outliers are plotted as points, I would like to have their 
> names plotted.
> 
> First of, how can I give my data series (class numeric) 
> names? Second, how could I adjust the boxplot to see the 
> names of the outliers in the graphic instead of the points?
> 
> cheers
> 
> 
> 
> --
> View this message in context: 
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