Ellipse trouble

[james2464]

James,

Solving the equation for x is the easy part:
x^2/a^2 + y^2/b^2 = 1
x^2/a^2 = 1 - y^2/b^2
x^2 = (1 - y^2/b^2 )*a^2
x = +sqr((1 - y^2/b^2 )*a^2)
and
x = -sqr((1 - y^2/b^2 )*a^2)
if I haven't made a mistake.

But you can use CIRCLE to draw ellipses.  Or, if you are into self-flagellation, there are algorithms using PSET.

Here is a start using CIRCLE (the ASPECT parameter!):

Thank you.   This is great info.   Nice to finally see the formula exactly as I would need to use it!

I've seen those extra commas before somewhere and had no clue what they meant.   I'll look into this more, assuming this is what you mean by ASPECT.