View License

Download apps, toolboxes, and other File Exchange content using Add-On Explorer in MATLAB.

» Watch video

Highlights from
fitting sum of two decaying exponentials (over damped oscillator)

Be the first to rate this file! 3 Downloads (last 30 days) File Size: 2.23 KB File ID: #35016 Version: 1.0

fitting sum of two decaying exponentials (over damped oscillator)



five-parameter fit to the equation A*exp(-t/T1) + B*exp( -t/T2 ) + offset

| Watch this File

File Information

 [A, B, T1, T2, offset, Ssq] = fit_overdamping( t, y, options )
 fitting overdamped harmonic oscillator of the form
 y(t) = A exp( -t/T1 ) + B exp( -t/T2) + offset
 where A and B are the amplitudes (assumed positive), and T1, T2 are the
 decay times. Ssq is the sum of residuals.
 options are 'notify' to show progress and 'plot' to give a plot
 you can also supply a guess or series of guesses via a row vector or
 matrix, m, where size( m, 2 ) = 5;
 if you just run program without arguments it will do an example
 examples are
 fit_overdamping( t, y, 'notify', 'plot')
 [A, B, T1, T2, offset] = fit_overdamping( t, y, [1 2 3 4 5])
 Note: this script uses LMFnlsq from MATLAB central file exchange 2/8/12

MATLAB release MATLAB 6.5 (R13)
Other requirements This program uses LMFnlsq, which can be downloaded from MATLAB central file exchange.
Tags for This File   Please login to tag files.
Please login to add a comment or rating.

Contact us