[R] rosavent problem

[David Winsemius]

On Apr 17, 2010, at 11:04 PM, Kevin Turner wrote:

> I have a frequency table that I am trying to plot on a rose diagram  
> using
> rosavent.  I've set the table up by using this line:
>
> Wind_freq_speed <- t(table(cut(Wind_Dir_vec, 0:36),  
> cut(Wind_Speed_vec,
> seq(0, to=60, by=10))))
>
> It produces the following table layout, which is consistent with the
> rosavent example (windfreq.dat).
>
>              10   20   30   40   50   60   70... 360
> 0-10
> 10-20
> 20-30
> 30-40
> 40-50
> 50-60
>
> However, when I use the rosavent command (i.e.  
> rosavent(Wind_freq_speed)),
> it produces a rose diagram with my data plotted 6 times around the 360
> degrees.  I also get the following error:
>
> Error in legend(-fmaxi - 2 * fint, fmaxi, fill = col, legend =  
> attr(frec,  :
> 'legend' is of length 0

If you indicated what package that function was from, then I missed  
it. The thought did occur to me that maybe it was expecting arguments  
in radians since 2*pi is fairly close to 6.

-- 
David


>
> Can anyone help me with this?
>
> Thanks.
>
> -- 
> Kevin Turner
> Department of Geography
> and Environmental Studies
> Wilfrid Laurier University
> Waterloo, Ontario
>
> 	[[alternative HTML version deleted]]
>
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David Winsemius, MD
West Hartford, CT