Fit a damped sine wave

Version 1.1.0.0 (3.54 KB) by Detlef Amberg
The function fits a damped sinewave to given (sampled) data.
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Updated 7 May 2015

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The function 'fit_damped_sinewave' fits a sequence
sigr(k)= Ar*exp(alphar*k) * cos(wr*k+phr), k=0..n-1
to a given sequence 'sig' .

The function determines the
Amplitude Ar, damping factor alphar, frequency wr and phase phr.
The function uses linear Algebra to find the parameters.

Cite As

Detlef Amberg (2024). Fit a damped sine wave (https://www.mathworks.com/matlabcentral/fileexchange/50756-fit-a-damped-sine-wave), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2007b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Version Published Release Notes
1.1.0.0

Calculation of amplitude/damping adjusted.
1.0.0.0