radialArea.radius([radius]) Equivalent to area.y, except the accessor returns the radius: the distance from the origin ⟨0,0⟩.

radialLine.angle([angle]) Equivalent to line.x, except the accessor returns the angle in radians, with 0 at -y (12 o’clock).

radialArea.outerRadius([radius]) Equivalent to area.y1, except the accessor returns the radius: the distance from the origin ⟨0,0⟩.

radialArea.lineOuterRadius() Returns a new radial line generator that has this radial area generator’s current defined accessor, curve and context. The line’s angle accessor is this area’s start angle accessor, and the line’s radius accessor is this area’s outer radius accessor.

radialArea.lineStartAngle() radialArea.lineInnerRadius() Returns a new radial line generator that has this radial area generator’s current defined accessor, curve and context. The line’s angle accessor is this area’s start angle accessor, and the line’s radius accessor is this area’s inner radius accessor.

radialArea.lineEndAngle() Returns a new radial line generator that has this radial area generator’s current defined accessor, curve and context. The line’s angle accessor is this area’s end angle accessor, and the line’s radius accessor is this area’s inner radius accessor.

radialArea.endAngle([angle]) Equivalent to area.x1, except the accessor returns the angle in radians, with 0 at -y (12 o’clock). Note: typically angle is used instead of setting separate start and end angles.

radialArea.innerRadius([radius]) Equivalent to area.y0, except the accessor returns the radius: the distance from the origin ⟨0,0⟩.

radialArea.angle([angle]) Equivalent to area.x, except the accessor returns the angle in radians, with 0 at -y (12 o’clock).

radialArea.curve([curve]) Equivalent to area.curve. Note that curveMonotoneX or curveMonotoneY are not recommended for radial areas because they assume that the data is monotonic in x or y, which is typically untrue of radial areas.