
On Dec 7, 2009, at 7:00 AM, hadley wickham wrote:

>> The idea of plotting a wind rose must be fairly common.  I wonder  
>> if it
>> would make sense to have a switch that would wrap data around the  
>> ends of a
>> continuous scale?
>
> Probably - but it requires a lot of work, because ggplot2 doesn't
> currently support circular scales, which is what you really want.
>

Thanks, the grammar of graphics is a conceptual help here.

When the Springer book makes its 2nd edition, it would help readers at  
my level of comprehension to mention the distinction between linear(?)  
and circular scales in 6.4.2 Position scales (p. 98), and to carry  
this distinction forward into 7.3.4 Non-Cartesian coordinate systems,  
especially under Polar coordinates, where wind roses are mentioned.

I'm enjoying the chance to develop a grammatical view of graphics, and  
really appreciate your excellent book and the detailed help you've  
provided me.

All the best,
Tom


Thomas S. Dye, Ph.D.
T. S. Dye & Colleagues, Archaeologists, Inc.
Phone: (808) 529-0866 Fax: (808) 529-0884
http://www.tsdye.com



	[[alternative HTML version deleted]]


