Fitting of complex values
- To: mathgroup at smc.vnet.net
- Subject: [mg31741] Fitting of complex values
- From: Ioan Alexandre Romoscanu <romoscanu at imes.mavt.ethz.ch>
- Date: Thu, 29 Nov 2001 00:14:27 -0500 (EST)
- Organization: Swiss Federal Institute of Technology (ETHZ)
- Sender: owner-wri-mathgroup at wolfram.com
Hi all
I have a question about nonlinear fdata fitting with Mathematica.
If one looks for parameters of a (real) function, with x as variable
and, say, {a,b} as parameter, one efficiently uses (from the help file)
NonlinearFit[data, FitFunction[x,a,b], x, {a,b}]
This works fine, but it requires the data and the FitFunction to be
*real* values.
Is there any way to fit a set of complex data with a complex
FitFunction, like, say,
data={{1,2+3i},...}
FitFunction=(a x+ i b x)/a
The algorithm implemented in NonlinearFit[ ] does not accept this. There
should be a way though, for complex values are still values (especially
in Mathematica, which nicely deals with complex number in general)
Please excuse me if I miss an important point.
Thanks in advance (and please, if you have a hint, please send it to me
per email too)
Alex.
--
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