This aster plot displays pie slices as lengths extending outward to the edge (0 at inner to 100 at outer). Widths of the pie slices represent the weight of each pie, which gets used to arrive at a weighted mean of the length scores in the center.
Jim Regetz @regetz developed the initial aster plot function in R (see aster-plot on github)
Parker Abercrombie @parkerabercrombie developed the initial D3 prototype varying 3 of the 4 arc elements starting with Mike Bostock's Donut Chart:
- outerRadius
- startAngle