symbol.size([size]) If size is specified, sets the size to the specified function or number and returns this

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

d3.symbolStar The pentagonal star (pentagram) symbol type.

d3.curveStep(context)

radialLine.radius([radius]) Equivalent to line

bundle.beta(beta) Returns a bundle curve with the specified beta in the range [0, 1], representing the bundle

line.curve([curve]) If curve is specified, sets the curve

arc.outerRadius([radius]) If radius is specified, sets the outer radius to the specified function or number

radialArea.outerRadius([radius]) Equivalent to

curve.point(x, y) Indicates a new point in the current line segment with the given x- and y-values