area.x1([x]) If x is specified, sets the x1 accessor to the specified function or number and returns this area

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

cardinal.tension(tension) Returns a cardinal curve with the specified tension in the range [0, 1]. The tension

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

d3.curveLinear(context)

stack.value([value]) If value is specified, sets the value accessor to the specified function or number and

pie(data[, arguments…]) Generates a pie for the given array of data, returning an array of objects representing

curve.areaEnd() Indicates the end of the current area segment.

radialArea.angle([angle]) Equivalent to area

area.lineX1() Returns a new line generator that has this area generator’s