quad: ~ Quadratic fitting function: quad ~
In DataViz: Data Visualisation Using an HTML Page and 'D3.js'

Fits a set of paired points with a quadratic curve. Returns the quadratic set of points. Function only called by r_throwchart.

1	quad(point,before_point,after_point,offSet)

`point`	[numeric] or [integer]: A set of points between before and after points.
`before_point`	[numeric] or [integer]: The first point of the curve.
`after_point`	[numeric] or [integer]: The last point of the curve.
`offSet`	[integer]: Single value offset for the graph.