Datum Curve from equation driven by parameters

[ptc-113439]

I am trying to make a parabola section from an equation. I can make the equation, but I would also like to drive the focal point with the same parameters. I can't seem to read the parameters into the protable editor or get them out - any ideas?
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[AndyDeighton-di]

You can put standard Pro/ENGINEER parameters into the equation. So if you create the parameters up front, you can then reference them in the curve by equation, by simply typing in the parameter name, i.e. Standard curve by equation (cartesian for a circle: x = 4 * cos ( t * 360 ) y = 4 * sin ( t * 360 ) z = 0 With Parameters defined up front (Tools>Parameters: ANGLE=360 Z_OFFSET=0 Curve Equation: x = 4 * cos ( t * ANGLE ) y = 4 * sin ( t * ANGLE ) z = Z_OFFSET If you now change the parameters, the curve will update.