Michiel
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 Apr 20 accepted Incomplete elliptic integral of the second kind and the arc length of an ellipse - does a simple relation exist? Apr 18 comment Incomplete elliptic integral of the second kind and the arc length of an ellipse - does a simple relation exist? Awesome, thanks!! Could you add this into your answer so I can except it?! (comments tend to be less permanent) Apr 18 revised Incomplete elliptic integral of the second kind and the arc length of an ellipse - does a simple relation exist? edited tags Apr 18 revised Incomplete elliptic integral of the second kind and the arc length of an ellipse - does a simple relation exist? corrected errors in formulas and added more of my work Apr 18 comment Incomplete elliptic integral of the second kind and the arc length of an ellipse - does a simple relation exist? Thanks! I corrected the equations in my post. Unfortunately, I was more sloppy in typing up the post then I was in my derivation, in which I did have the correct expressions. So my question still holds Apr 18 revised Incomplete elliptic integral of the second kind and the arc length of an ellipse - does a simple relation exist? corrected errors in formulas Apr 17 asked Incomplete elliptic integral of the second kind and the arc length of an ellipse - does a simple relation exist? Apr 4 revised Approximations of the incomplete elliptic integral of the second kind added some detail Apr 4 comment Approximations of the incomplete elliptic integral of the second kind Great, I will give that a try! Thanks! Apr 4 comment Approximations of the incomplete elliptic integral of the second kind @J.M. I need the approximation to determine $l=f(\phi)$ such that I can rewrite it in a form $\phi=f(l)$. With the exact elliptic integral that doesn't seem possible. Apr 4 comment Approximations of the incomplete elliptic integral of the second kind @J.M. the use of pade approximants seems to me to be a fairly involved approach in which I have to determine all the prefactors, which I would probably need a computer for so then I don't see the point in using the approximation over the 'real' incomplete elliptic integral Apr 3 awarded Commentator Apr 3 comment Approximations of the incomplete elliptic integral of the second kind I hadn't seen it yet, but after taking a look it doesn't get much clearer for me. I can see that Eq 21 in the link is an approximation, but I am not sure how I would go about applying it? Apr 3 revised Approximations of the incomplete elliptic integral of the second kind deleted 2 characters in body Apr 3 asked Approximations of the incomplete elliptic integral of the second kind Apr 3 comment Detect values in array that are statistically inconsistent That's a good point. I guess you have to know quite a bit about the physics/chemistry of what you're measuring to be able to set a sensible absolute or relative threshold. Mar 31 revised Problems with votes added 406 characters in body Mar 31 comment Problems with votes Pretty sure that there should be, but that is a bit too tough a nut to crack for me. Mar 31 revised Problems with votes added 243 characters in body Mar 31 suggested rejected edit on Problems with votes