a positive numeric vector. Angles are the same than those used for the first pie but radii change according to the values in .
init.angle
initial angle
multi
radius scale multiplier
col
colors of the p2 (foreground) slices
bg
colors of the p1 (background) slices
lwd
line width of the pie wedge boundaries
pie.labs
boolean labels for the pies
grid
boolean
grid.labs
boolean, scale indicators
scale
boolean
p1.circle
boolean
References
D. G. Feitelson (2003), "Comparing Partitions with Spie Charts".
School of Computer Science and Engineering,
The Hebrew University of Jerusalem.
http://www.cs.huji.ac.il/~feit/papers/Spie03TR.pdf
Michael Friendly (2000), Gallery of Data Vizualisation :
The Best and Worst of Statistical Graphics.
http://www.math.yorku.ca/SCS/Gallery/