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

[Thomas Lumley]

You may be looking for the range=0 argument to boxplot().

     -thomas

On Mon, 20 Jul 2009, Douglas Bates wrote:

> 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".
>
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Thomas Lumley			Assoc. Professor, Biostatistics
tlumley at u.washington.edu	University of Washington, Seattle