Timeline for Looking for function to fit sigmoid-like curve
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Jan 9, 2017 at 12:09 | history | edited | Glen_b | CC BY-SA 3.0 |
wikipedia is an example of *a* wiki, it is not "wiki" -- there are thousands of wikis
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| Apr 7, 2016 at 19:59 | comment | added | Nick Cox | Quite, but I (and somehow my brother too) conjured up a non-existent misle (as stated above). | |
| Apr 7, 2016 at 19:55 | comment | added | user78229 | @NickCox How is that nonsense? Misled is the past participle of mislead. Based on the Urban Dictionary's definition of misle, they would all be cognates (see urbandictionary.com/define.php?term=misle). Of course, the UD is alone in this regard as all the other online dictionaries define misle as a fine mist or rain. Chalk it up to the vicissitudes of yout, I guess... | |
| Apr 7, 2016 at 17:55 | comment | added | Nick Cox | I agree! I thought "misled" was the past participle of "misle" for some while in my youth, which was complete nonsense, so these little verbal mistakes can stick. | |
| Apr 7, 2016 at 17:50 | comment | added | user78229 | @NickCox I've always used tautological to mean deterministic and/or "lock-step" results but, prompted by your query, I see that it doesn't necessarily mean that, hence the confusion. I definitely do not intend it to mean needless repetition. | |
| Apr 7, 2016 at 17:45 | comment | added | Nick Cox | Tautological: what does that mean here? Do you mean autocatalytic? | |
| Apr 7, 2016 at 17:41 | comment | added | user78229 | @nickcox It is a tautological function...and thanks for cleaning up the post... | |
| Apr 7, 2016 at 17:35 | comment | added | Nick Cox | This curve is monotonic and has no turning points. Nor will it ever cross zero. $a$ gives the sign to $y$: $a$ negative implies that $y$ is always negative and declines to a negative asymptote. $a$ positive implies the opposite: $y$ is always positive and increases to a positive asymptote. Your choice, but it doesn't look flexible enough for your needs. | |
| Apr 7, 2016 at 17:31 | comment | added | Nick Cox | @DJohnson I've hacked at the mathematical typesetting. Do roll back the edit if you don't like it. | |
| Apr 7, 2016 at 17:30 | history | edited | Nick Cox | CC BY-SA 3.0 |
edited body
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| Apr 7, 2016 at 16:17 | comment | added | Rififi | Correction: can y go below 0, then go back to positive values ? As shown in the picture of the question. From the wiki, it seems there is a plateau on the left side of the curve, and one on the right side. | |
| Apr 7, 2016 at 16:14 | comment | added | user78229 | Yes! See the Wiki page for confirmation... | |
| Apr 7, 2016 at 16:07 | comment | added | Rififi | Can f(x) be < 0 ? | |
| Apr 7, 2016 at 16:01 | history | answered | user78229 | CC BY-SA 3.0 |