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Logistic Fit
01-21-2014, 04:46 PM
Post: #11
RE: Logistic Fit
Well, this logistic fit was pulled from the old hp math library, but frankly it was never any good due to being so sensitive to even minor changes in numbers. When I was reimplementing it for the 39gII, I really wanted to switch it for a much better and more robust algorithm. However, after many many fruitless days of searching (over many months) I was never able to find a good fit that behaved predictably. The biggest challenge with this type of fit is finding good initial estimates. A human can easily identify what a reasonable estimate is, and whether it should be an increasing/decreasing version, but finding an algo that matched what is desired proved ridiculous difficult.

If anyone has any recommendations or suggestions, I am totally welcome to them.

TW

Although I work for the HP calculator group, the views and opinions I post here are my own.
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Messages In This Thread
Logistic Fit - jgreenb2 - 01-17-2014, 11:43 PM
RE: Logistic Fit - Tim Wessman - 01-18-2014, 02:21 PM
RE: Logistic Fit - jgreenb2 - 01-18-2014, 04:14 PM
RE: Logistic Fit - Helge Gabert - 01-19-2014, 09:48 PM
RE: Logistic Fit - Thomas Klemm - 01-19-2014, 10:12 PM
RE: Logistic Fit - Helge Gabert - 01-20-2014, 05:44 AM
RE: Logistic Fit - jgreenb2 - 01-20-2014, 01:52 PM
RE: Logistic Fit - Helge Gabert - 01-20-2014, 03:01 PM
RE: Logistic Fit - jgreenb2 - 01-20-2014, 06:44 PM
RE: Logistic Fit - Tugdual - 01-21-2014, 06:43 AM
RE: Logistic Fit - Tim Wessman - 01-21-2014 04:46 PM
RE: Logistic Fit - Han - 01-22-2014, 04:02 AM
RE: Logistic Fit - Tim Wessman - 01-22-2014, 03:51 PM
RE: Logistic Fit - Helge Gabert - 01-22-2014, 04:14 PM
RE: Logistic Fit - Han - 01-22-2014, 04:38 PM
RE: Logistic Fit - Helge Gabert - 01-22-2014, 06:16 PM



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