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

area.lineY1() Returns a new line generator that has this area generator’s

area.y1([y]) If y is specified, sets the y1 accessor to the specified function or number and returns this area

d3.stackOffsetExpand(series, order) Applies a zero baseline and normalizes the values for each point such that the topline

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

d3.symbolTriangle The up-pointing triangle symbol type.

arc.padAngle([angle]) If angle is specified, sets the pad angle to the specified function or number and returns

d3.curveBundle(context)

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

radialLine.defined([defined]) Equivalent to