[mathcad] Re: Sinus regression using genfit

Author: William J Marshall Posted: Wed, 15 Feb 2006 13:14:12 -0500

Switching to the Optimized L-M method produced results for me (using V13),
but apparently having a choice of solution algorithm is not available in
V11.2.
- Bill

"Torgrim
Sandvoll"
<torgrim@sandvoll To
.com> Mathcad Discussion List
"mathcad"
02/15/2006 12:14 cc
PM
Subject
[mathcad] Sinus regression using
Please respond to genfit
"mathcad"
ptscience.com

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
[attachment "SINUSregresjon.mcd" deleted by William J

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