OpenSCAD 2D printable math functions

This a simple script that allows to 3Dprint a 2D math function. Just open the file in OpenSCAD, edit the function you wish to plot, edit intervals and scales, render it and print. Now you can touch with your hands that nice math functions you have only seen in pictures. Print them and use them in your own models. Make the kids learn its names, and make them familiar with mathematical objects. Show people how fun maths can be!!!

This design compliments my other one here: http://www.thingiverse.com/thing:1052097