Interactive Peak Fitter (Version 4.1)

Keyboard operated peak fitting function for time-series signals.

Description

A peak fitting program for time-series signals, written as a self-contained function in a single m-file. Uses an non-linear optimization algorithm to decompose a complex, overlapping-peak signal into its component parts. The objective is to determine whether your signal can be represented as the sum of fundamental underlying peaks shapes. Accepts signals of any length, including those with non-integer and non-uniform x-values. Fits Gaussian, exponentially-broadened Gaussian, Lorentzian, Pearson, and Logistic shapes (expandable to other shapes). Unlike the previous version of this program, this one does not use sliders, which were giving some people problems. See http://www.wam.umd.edu/~toh/spectrum/InteractivePeakFitter.htm for more information. Version 4.1, April 18: Added Autozero ON/OFF notification at top, and "k" keypress to print out list of commands.

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
Interactive Peak Fitter, version 2.2
This submission has inspired the following:
Peak Fitter

• MATLAB release: MATLAB 6.5 (R13)
• Other Files: ipf.m, ; license.txt

[Tom O'Haver]

This latest version (3.3) add two features:

1. It computes the model at 100 points regardless of number of data points, giving the graph a smoother appearance.

2. A new keypress function, "d", to print out x,y values of the current data segment.

[John D'Errico]

Please do not upload two copies of the same file. If you wish to update a file, then click on the update link on the file page.

Delete one of the copies.

[Wang Hai]

good

[Lissa]

 

[Tom O'Haver]

Version 4: April 2008: Added keypress function "x" to refine the fit by performing 10 trial fits with slightly different first guesses and take the one with the lowest fitting error. You can change the number of trials, "NumTrials", in line 69 (the default is 10)