On 01/27/2011 05:04 AM, ogbos okike wrote:
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"
Hi Ogbos,
Adding "error bars" is easy, but as Josh pointed out, may not mean much.
If you are seeking to illustrate a confidence interval for the median,
it may be better to use points or symbols and error bars rather than
boxplots.
Jim
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