Help Generating an S-Curve/Sigmoid?

Questions
1

Hallo -
I am hoping to make a conventional “double s-curve”/sigmoid, like the attached image , but I’m finding it difficult to tune in correctly. Can anyone suggest an object to do this with?
640px-Logistic-curve.svg

2

One way is to use Env:

Env([0, 1], [1], curve: 'sine').plot;

Best,
Paul

3

Thank you! Is there a way to adjust the curvature on either end?

4

Yes using numbers for curve instead of sine. For s-shaped, 2 stages are needed:

Env([0, 0.5, 1], [1,1], curve: [-2, 2]).plot;
Env([0, 0.5, 1], [1,1], curve: [-4, 4]).plot;
Env([0, 0.5, 1], [1,1], curve: [-8, 8]).plot;
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5

I know this marked as solved but… sometimes i use .scurve or tanh operator rather than going the Env route.

(0,0s1..1).scurve.plot;

Also works with .hanWindow, welWindow. etc.

I will see myself out.
Lukiss.

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