Sum of sines optimized starting points

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Andrew on 22 Nov 2023
Edited: Torsten on 23 Nov 2023
Dear community,
Matlab uses optimized starting points to fit a sum of sines model to data in the Curve Fitting Toolbox.
Does somebody know the algorithm MATLAB uses to determine the starting points? I have a slightly different sines model, but the optimized starting points are not available for custom equations.
Best regards,

Accepted Answer

Torsten on 23 Nov 2023
Edited: Torsten on 23 Nov 2023
If your problem is linear in the fitting parameters (which is usually the case for a sum of sines), you don't need initial values for the parameters. You can directly determine the parameters in one step by solving an overdetermined linear system of equations.

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