A sunburst: the hierarchy of a series' categories as rings about a hole, the top-level categories innermost, each segment's angle its value's share; only the first series is drawn.
In px: the hole's radius.
In px: the outer ring's outer edge.
A sunburst: the hierarchy of a series' categories as rings about a hole, the top-level categories innermost, each segment's angle its value's share; only the first series is drawn.