[mathcad] Sinus regression using genfit

[mathcad] Sinus regression using genfit
Author: Torgrim Sandvoll Posted: Wed, 15 Feb 2006 18:12:38 +0100
Hi, Trying to fit the general function: f(x,a):a0sin(a1(x+a2))+a3 (See attached Mathcad (v11+) document) Have tried with genfit, but this method seems very sensitive to the guess values given. Any better way to solve this problem would be appreciated! Have a nice day! :-) Best regards, Torgrim Sandvoll

[mathcad] Sinus regression using genfit

Author: Torgrim Sandvoll Posted: Wed, 15 Feb 2006 18:14:25 +0100

Hi,

Trying to fit data to the general (sinusoidal) function:
f(x,a):a0*sin(a1*(x+a2))+a3
(The periodic data for regression is often used in Norwegian highschool
math)

(See attached Mathcad (v11+) document)

Have tried with genfit, but this method seems very sensitive to the guess
values given.

Any better way to solve this problem would be appreciated!

Have a nice day! :-)

Best regards,
Torgrim Sandvoll

Attachments:
SINUSregresjon.mcd

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