draw a curve knowing the equation

[Piermario93]

Bye to all,
I press that I use autocad 2010, I have a problem, I have to draw a curve and I know the equation, precisely it is a cubica, I tried to look around if there is some lisp but I found nothing that can do to my case. and even using the spline command I can't draw it properly. Does anyone know about it? Or can someone tell me how to draw it?

Thank you very much in advance

 

[rpor66]

If you know how to program, I don't say in lisp, in any language, through the equation, calculate the sequence of points as x,y,z coordinates and store them in a .txt file, get a routine that matters the points by drawing a polyline and through the options of the pedit command make it spline.

p.s.: usually the stored points have the following syntax:
(2.00 1.00 0.00)
♪

bye