U++ framework: ScatterDraw & ScatterCtrl » Added GuessCoeff() to improve Fit() performance

Home » U++ Library support » ScatterDraw & ScatterCtrl » Added GuessCoeff() to improve Fit() performance

Show: Today's Messages :: Polls :: Message Navigator
E-mail to friend

Added GuessCoeff() to improve Fit() performance [message #44229]

Mon, 02 February 2015 09:24

koldo
Messages: 3459
Registered: August 2008

Senior Veteran

Fit() permits to adjust a series of data to a function through regression analysis.

As Fit() is for general use, it does not know special properties of equations to be fitted. This could be a problem if the initial conditions are not properly set, so in many cases Fit() will not converge.

To solve this it has been added GuessCoeff(). It permits to guess a proper initial conditions to let Fit() adjust successfully.

For example, SinusEquation represents y = offset + A*sin(w*t + phi) equation, and now includes GuessCoeff(). This helps to fit raw data like shown here:

index.php?t=getfile&id=4720&private=0

Attachment: img.jpg
(Size: 135.20KB, Downloaded 622 times)

Best regards
Iñaki

Report message to a moderator

Previous Topic:	Control only with keys
Next Topic:	New user equations to be entered at run time

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri May 29 17:57:49 GMT+2 2026

Total time taken to generate the page: 0.00489 seconds