symbol(arguments…) Generates a symbol for the given arguments. The arguments are arbitrary; they are simply

d3.radialArea()

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

radialArea.startAngle([angle]) Equivalent to area

area.defined([defined]) If defined is specified, sets the defined accessor to the specified function or boolean

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

d3.curveBasis(context)

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

pie.startAngle([angle]) If angle is specified, sets the overall start angle of the pie to the specified function

d3.curveCardinal(context)