[R] what is meaning of the bubbles in boxplots?

[Douglas Bates]

On Mon, Jul 20, 2009 at 5:18 AM, Jie TANG<totangjie at gmail.com> wrote:
> Hi ,everyone ,
>  I draw some boxplot figure with the command "boxplot".But in the
> figure,there are some bubbles at the top part of the figure.
>
>  Can anyone tell me what the correct meaning of these bubbles?and how to
> remove it?

Those are data points that are considered to be outliers.  As to how
to remove them, that's a tricky question, more as to why than how.
The purpose of showing those points in a different way is to emphasize
that those points deserve special attention.  You do not want to just
"make them go away".