symbol.type([type]) If type is specified, sets the symbol type to the specified function or symbol type and

radialArea.defined([defined]) Equivalent to

area.y0([y]) If y is specified, sets the y0 accessor to the specified function or number and returns this area

curve.lineEnd() Indicates the end of the current line segment.

line.context([context]) If context is specified, sets the context and returns this line generator. If context

d3.curveCatmullRomOpen(context)

line(data) Generates a line for the given array of data. Depending on this line generator’s associated

d3.symbolWye The Y-shape symbol type.

pie.sortValues([compare]) If compare is specified, sets the value comparator to the specified function and

radialLine.curve([curve]) Equivalent to line