The Animated Zoo
of Matlab/Octave Signal Processing
Tools and Demos
applications of the interactive peak detector, iPeak
Jumping from peak to
peak in iPeak
(space and tab keys)
custom first-guess peak position in the interactive
peak fitter, ipf.m
using iSignal in frequency spectrum
curve fitting a very noisy signal using peakfit.m
various functions of iSignal.
Finding and fitting variable numbers of
peaks. Peak detection followed by iterative curve
fitting using findpeaksfit.m
Applying multiple curve fits to
a signal that is changing with time.
Effect of changing width on the frequency spectrum of
subtraction in the interactive peak fitter,
deconvolution of a Gaussian-broadened rectangular
pulse, demonstrating the effect of changing the
The . iPower demonstrator
shows the frequency
of various types of signals
deconvolution of a Gaussian-broadened narrow
peak , with the aim of recovering the original
Looking for the peaks
in a complex experimental signal using iPeak.m
Measuring peak height and area by
different methods in a variety of signal types, using measurepeaks.m. The
individual peaks are displayed separately in the right-hand
panel, with the peaks, valleys, and tangent lines shown in
Background information on these and other signal processing
methods is available in:
Unsolicited Comments from Users
" Your program
" iPeak is
like falling out of a tree and landing in a soft couch
complete with a book and a good reading light!
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Fitter [ ipf.m]...worked
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Your code is
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download your very nice PeakFitter.
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Peak Fitter and Interactive Peak Fitter programs." "I
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and love it.. ..worked like a charm " "
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and peakfit..." "...
it really is a fine manual - your pdf document on curve
Peak Fitter ... is very helpful."
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program and it is great - thank
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noisy data...were very helpful
for my experimental work."
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quite literally EXACTLY what I was looking for and far better than I could have hoped."
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program is fantastic."
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has been much help for me!
"... Interactive Fourier
Filter is a great tool ...
and best of all, you can view the effect of filtering parameters
on your time-series as you change them! " ( reference)
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past day to analyze my data, and it works GREAT!....
I am able to extract lots of information from my spectra now."
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well done and easy to use."
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to solve one problem, I will send to you the paper after
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finding and measurement is amazing!"
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"... iPeak ...
is very useful." "...
your scripts are wonderful."
nice tutorial and Matlab functions that are extremely
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"Wow! ... this is exactly what I needed."
"You programs work very well and are very helpful to me. "
"...very convenient and well-written..." "...
your interactive peak fitter
code for Matlab...has been very useful!"
Copyright (c) 2014, 2017 Thomas C. O'Haver
Permission is hereby granted, free of charge, to any person
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First edition created in 2006. Last updated
March, 2017. Created with SeaMonkey.
This page is part of " ", a A Pragmatic
Introduction to Signal Processing retirement
project and international community
service, created and maintained by Prof. Tom O'Haver ,
Department of Chemistry and Biochemistry, The University of Maryland
at College Park. Comments, suggestions and questions should be
directed to Prof. O'Haver at firstname.lastname@example.org.
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