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

Uwe Ligges ligges at statistik.tu-dortmund.de
Mon Jul 20 10:44:58 CEST 2009



Jie TANG 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?


See some textbook about boxplots. For very short: These "bubbles" are 
probably some values of your data outside 1.5 x interquartilerange from 
the .25/.75 quartiles.

Uwe Ligges




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