pie.value([value]) If value is specified, sets the value accessor to the specified function or number and returns this pie generator. If value is not specified, returns the current value accessor, which defaults to: function value(d) { return d; } When a pie is generated, the value accessor will be invoked for each element in the input data array, being passed the element d, the index i, and the array data as three arguments. The default value accessor assumes that the input data are numbe

point.align([align]) If align is specified, sets the alignment to the specified value which must be in the range [0, 1]. If align is not specified, returns the current alignment which defaults to 0.5. The alignment determines how any leftover unused space in the range is distributed. A value of 0.5 indicates that the leftover space should be equally distributed before the first point and after the last point; i.e., the points should be centered within the range. A value of 0 or 1 may be used t

point.copy() Returns an exact copy of this scale. Changes to this scale will not affect the returned scale, and vice versa.

point(value) Given a value in the input domain, returns the corresponding point derived from the output range. If the given value is not in the scale’s domain, returns undefined.

pie.sortValues([compare]) If compare is specified, sets the value comparator to the specified function and returns this pie generator. If compare is not specified, returns the current value comparator, which defaults to descending value. The default value comparator is implemented as: function compare(a, b) { return b - a; } If both the data comparator and the value comparator are null, then arcs are positioned in the original input order. Otherwise, the data is sorted according to the dat

pie.startAngle([angle]) If angle is specified, sets the overall start angle of the pie to the specified function or number and returns this pie generator. If angle is not specified, returns the current start angle accessor, which defaults to: function startAngle() { return 0; } The start angle here means the overall start angle of the pie, i.e., the start angle of the first arc. The start angle accessor is invoked once, being passed the same arguments and this context as the pie generator.

pie.padAngle([angle]) If angle is specified, sets the pad angle to the specified function or number and returns this pie generator. If angle is not specified, returns the current pad angle accessor, which defaults to: function padAngle() { return 0; } The pad angle here means the angular separation between each adjacent arc. The total amount of padding reserved is the specified angle times the number of elements in the input data array, and at most |endAngle - startAngle|; the remaining sp

pie.endAngle([angle]) If angle is specified, sets the overall end angle of the pie to the specified function or number and returns this pie generator. If angle is not specified, returns the current end angle accessor, which defaults to: function endAngle() { return 2 * Math.PI; } The end angle here means the overall end angle of the pie, i.e., the end angle of the last arc. The end angle accessor is invoked once, being passed the same arguments and this context as the pie generator. The un

pie.sort([compare]) If compare is specified, sets the data comparator to the specified function and returns this pie generator. If compare is not specified, returns the current data comparator, which defaults to null. If both the data comparator and the value comparator are null, then arcs are positioned in the original input order. Otherwise, the data is sorted according to the data comparator, and the resulting order is used. Setting the data comparator implicitly sets the value comparator

path.rect(x, y, w, h) Creates a new subpath containing just the four points ⟨x, y⟩, ⟨x + w, y⟩, ⟨x + w, y + h⟩, ⟨x, y + h⟩, with those four points connected by straight lines, and then marks the subpath as closed. Equivalent to context.rect and uses SVG’s “lineto” commands.