Need curve fitting routine for ampl. _and_ phase

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#804

From: John Hudson
Date: Mon, 16 Nov 1992 15:42

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I need curve fitting routine (or even an algorithm that is
known to work) that will fit data to a 2 or 3 harmonic 
cosine wave with the amplitude and phase of each harmonic.

I would rather use a routine that is written specifically for
this case than apply a general nonlinear fitter.

Thanks in advance,

John Hudson

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Newsgroups: sci.math.num-analysis
Path: arc1-ca.pugleaf.net!sparky!uunet!think.com!sdd.hp.com!ux1.cso.uiuc.edu!hudson
From: hudson@ux1.cso.uiuc.edu (John Hudson)
Subject: Need curve fitting routine for ampl. _and_ phase
Message-ID: <BxtFMq.Jwo@ux1.cso.uiuc.edu>
Summary:  of n-harmonic cos wave
Organization: University of Illinois at Urbana-Champaign
Date: Mon, 16 Nov 1992 15:42:12 GMT
Lines: 11