Dear all,
I am trying to add error bars on a boxplot but have encountered an error as
indicated below. Is there a package I need to install or a library I have to
load before this goes please.
Thanks for any idea.
Ogbos

x<-replicate(20,rnorm(50))
 boxplot(x,notch=TRUE,main="Notched boxplot with error bars")
 error.bars(x,add=TRUE)
Error: could not find function "error.bars"

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