Re: [R] How to add a line on the boxplot

From: Uwe Ligges <ligges_at_statistik.uni-dortmund.de>
Date: Sat 22 Jul 2006 - 19:59:15 EST

Jiantao Shi wrote:

> Hi,
> I have a data frame,
>
>

>>df=rnorm(1000)
>>dim(df)=c(100,10)
>>

>
> And i can get the boxplot,
>
>
>>boxplot(data.frame(df))

>
>
>
> So how can add a line (aline) on the existing boxplot,eg,
>
>
> Thanks in advance.

Example:

df <- rnorm(1000)
dim(df) <- c(100,10)
boxplot(data.frame(df))
aline <- apply(df, 2, max)

# , now you might want either
abline(h = aline, col = "green", lty="dotted") # or
segments(seq(along = aline) - 0.2, aline,

          seq(along = aline) + 0.2, aline,
          lwd = 2, col = "red")



Uwe Ligges

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R-help@stat.math.ethz.ch 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. Received on Sat Jul 22 19:59:55 2006

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