radialArea.curve([curve]) Equivalent to area

d3.symbolCross The Greek cross symbol type, with arms of equal length.

d3.pie() Constructs a new pie generator with the default settings.

d3.arc() Constructs a new arc generator with the default settings.

d3.curveCardinalOpen(context)

stack.offset([offset]) If offset is specified, sets the offset accessor to the specified function or array