Re: non-linear regression

[Paul Kienzle]

octave-forge (http://octave.sf.net) has leasqr and, for
complex b, expfit.

If your data are regularly spaced, you may want to use
fft to generate an initial estimate.  For irregularly spaced
data, octave-forge has irsa functions for calculating the
discrete fourier transform.

Paul Kienzle
address@hidden

On Feb 25, 2004, at 11:04 AM, Al Niessner wrote:

> I am trying to fit a sine wave (A*sin(b*x+C) +D) to a set of data --
> least square. Is there an existing function in octave to help with 
> this.
> I checked the documentation (online) and browsed the 'octave> help' but
> nothing jumped out at me.
>
> --
> Al Niessner <address@hidden>
> Jet Propulsion Laboratory
>
> All opinions stated above are mine and do not necessarily reflect
> those of JPL or NASA.
>
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Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
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