| Fourier Fitting Data in PV-Wave [message #70721] |
Tue, 04 May 2010 11:03  |
Solargus
Messages: 5
Registered: May 2010
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Junior Member |
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I've searched the online PV-Wave manual and this news group, but I
cannot find anything on Fourier fitting a (nonlinear) data set and
returning the Fourier series for that fit. Can anyone point me in the
right direction?
Thanks!
Solargus
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| Re: Fourier Fitting Data in PV-Wave [message #70789 is a reply to message #70721] |
Wed, 05 May 2010 09:19  |
Solargus
Messages: 5
Registered: May 2010
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Junior Member |
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On May 4, 10:25 pm, Craig Markwardt <craig.markwa...@gmail.com> wrote:
> On May 4, 2:03 pm, Solargus <solar...@gmail.com> wrote:
>
>> I've searched the online PV-Wave manual and this news group, but I
>> cannot find anything on Fourier fitting a (nonlinear) data set and
>> returning the Fourier series for that fit. Can anyone point me in the
>> right direction?
>
> It's unclear what you mean by "nonlinear." A Fourier series is the
> *linear* combination of the Fourier basis functions. One way to
> estimate Fourier coefficients is with the Fourier transform, or FFT.
>
> Craig
What I mean by "nonlinear" is that the data visually fits a quasi-
sinusoidal pattern.
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| Re: Fourier Fitting Data in PV-Wave [message #70810 is a reply to message #70721] |
Tue, 04 May 2010 19:25 |
Craig Markwardt
Messages: 1869
Registered: November 1996
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Senior Member |
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On May 4, 2:03 pm, Solargus <solar...@gmail.com> wrote:
> I've searched the online PV-Wave manual and this news group, but I
> cannot find anything on Fourier fitting a (nonlinear) data set and
> returning the Fourier series for that fit. Can anyone point me in the
> right direction?
It's unclear what you mean by "nonlinear." A Fourier series is the
*linear* combination of the Fourier basis functions. One way to
estimate Fourier coefficients is with the Fourier transform, or FFT.
Craig
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