[R-sig-Geo] Plot several BoxPlots

[ping yang]

Hi R users,

I saw a plot like this:
[image: Inline image 1]
I am wondering how to generate this plot (especially plotting the three
items for each season), Can anyone here give me some hints/instructions on
this plot?

Thanks and Regards,

-- 
Ping Yang, Ph.D.
CUNY Environmental Crossroads Initiative
The City College of New York - CUNY
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