rosavent {climatol}  R Documentation 
Plot of a windrose. Wind frequencies may be supplied by speed intervals, and can be absolute or relative.
rosavent(frec, fnum=4, fint=5, flab=2, ang=3*pi/16,
col=rainbow(10,0.5,0.92,start=0.33,end=0.2), margen=c(0,0,4,0), key=TRUE,
uni="m/s", ...)
frec 
Data frame containing the wind frequencies. 
fnum 
Number of reference circles to plot. 
fint 
Frequency steps (in %) between reference circles. 
flab 
Parameter indicating which circles must be labelled:

ang 
Angle along which circles will be labelled. 
col 
Colors to fill the frequency polygons. 
margen 
Margins vector for the plot (to be passed to 
key 
Set to FALSE if you do not want a legend of the windrose, that will otherwise be plotted if frequencies are supplied by speed intervals. 
uni 
Speed units for the legend header. 
... 
Other graphic parameters. 
The number of direction classes is indifferent: As many as elements of the frequency vector (or columns of the matrix) will be considered, but the first element (column) must correspond to North. Frequencies will be converted to percentages, no matter how they were supplied.
No value is returned by this function.
data(windfr)
rosavent(windfr, 4, 4, ang=3*pi/16, main="Annual windrose")