Timeline for Is there a formula for an s-shaped curve with domain and range [0,1]?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S May 28 at 3:07 | history | suggested | cottontail | CC BY-SA 4.0 |
mathjax improvements; show hidden graph
|
| May 28 at 2:20 | review | Suggested edits | |||
| S May 28 at 3:07 | |||||
| Nov 12, 2022 at 16:48 | comment | added | hosford42 | Numerically stable formulation: f(x) = x^b/(x^b + (1-x)^b) | |
| Jun 5, 2020 at 9:57 | review | Suggested edits | |||
| Jun 5, 2020 at 17:48 | |||||
| May 9, 2019 at 17:27 | comment | added | wmsmith | You can add an extra level of adjustment so that you can tune the position at which the function is equal to .5 by using y=1/(1+(x^r/(1-x^r))^-b). Then, to attain y=.5 at x0 set r=-log(2)/log(x0). Or, if you want to ensure that y=k for some k between 0 and 1 at x=x0 then set r=-log((1/k - 1)^(1/b)+1)/log(x0) | |
| Jan 10, 2018 at 10:05 | comment | added | Ismam Huda | Hi Darkmoor, I got this equaion by playing around with the "inverse logit function". You can see that it resembles y=inverse logit (x) = 1 / (1 + e^-x) Because logit maps to (0,1) imgur.com/a/H0kGF | |
| Jan 8, 2018 at 10:39 | comment | added | Darkmoor | Is this a standard function like the $tanh$ of $sin$? I am interested to identify it in the wed but I could not. Could you please give a reference? | |
| Jul 8, 2017 at 8:57 | review | Late answers | |||
| Jul 8, 2017 at 9:18 | |||||
| Jul 8, 2017 at 8:47 | review | First posts | |||
| Jul 8, 2017 at 14:12 | |||||
| Jul 8, 2017 at 8:40 | history | answered | Ismam Huda | CC BY-SA 3.0 |