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

area.x([x]) If x is specified, sets x0

d3.curveBasis(context)

arc.startAngle([angle]) If angle is specified, sets the start angle to the specified function or number and

d3.stackOrderAscending(series) Returns a series order such that the smallest series (according to the sum of values) is at the

symbolType.draw(context, size) Renders this symbol type to the specified context with the specified size

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

pie.sort([compare]) If compare is specified, sets the data comparator to the specified function and returns

radialArea.radius([radius]) Equivalent to area

d3.radialArea()