Rank: 49 based on 910 downloads (last 30 days) and 24 files submitted
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Tom O'Haver

E-mail
Company/University
U. of Maryland College Park

Personal Profile:

Retired university professor. Google me.

Professional Interests:
http://terpconnect.umd.edu/~toh

 

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Files Posted by Tom View all
Updated   File Tags Downloads
(last 30 days)
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08 Aug 2014 Screenshot iSignal 3.4 Interactive smoothing, differentiation, peak sharpening and measurement of time-series signals. Author: Tom O'Haver signal processing, data import, chemistry, data exploration, medical, pharmaceutical 83 11
  • 5.0
5.0 | 4 ratings
29 Jul 2014 Screenshot Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver chemistry, curve fitting, decomposition, peak fitting, physics, time series 219 84
  • 4.55556
4.6 | 19 ratings
25 Jun 2014 Screenshot iPeak: Interactive Peak Detector (Version 6) Keypress operated interactive peak detector function. Author: Tom O'Haver analytical chemistry, chemistry, instrumental analysis, peak detection, physics, signal processing 50 27
  • 4.75
4.8 | 8 ratings
20 Jun 2014 Screenshot Interactive Peak Fitter (Version 10.4) Keyboard operated peak fitting function for time-series signals. Author: Tom O'Haver chemistry, physics, peak fitting, curve fitting, time series, decomposition 54 21
  • 3.0
3.0 | 4 ratings
20 May 2014 Screenshot ifilter: Interactive Fourier filter function, version 4 Keyboard-operated interactive Fourier filter function for time-series signals. Author: Tom O'Haver communications, measurement, signal processing 27 1
  • 4.5
4.5 | 3 ratings
Comments and Ratings by Tom View all
Updated File Comments Rating
21 Aug 2014 Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver

Ali, I can work on that. What's the specifications of your peaks: shape, height ratio, x-positions, and widths? How much noise? Are both peaks important in your work, or only the smaller one?

24 Jul 2014 Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver

Yes, it's the full width at half maximum (at least for the Gaussian and Lorentzian shapes).

21 Jun 2014 Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver

Here's what I have in my library:

Fitting Experimental Data, Chris Brown, Randal Nelson

Non-Linear Regression, Samuel L.Baker

Probabilistic peak detection for first-order chromatographic data,
by Lopatka, Vivó-Truyols, and Sjerps

Modeling and Simulation: a Comprehensive and Integrative View, Tuncer I. Ören

Curve Fitting, the Reliability of
Inductive Inference, and the Error - Statistical Approach, Aris Spanos

Comparison of public peak detection algorithms for MALDI mass spectrometry data analysis, Chao Yang, Zengyou He and Weichuan Yu

Analysis of First-Derivative Based QRS Detection Algorithms, Natalia M. Arzeno, Zhi-De Deng, and Chi-Sang Poon,

You can find these and others online using Google search or Google Scholar.

09 Jun 2014 Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver

Try using a negative value for the Fano factor (the input argument called 'extra')

05 Jun 2014 Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver

Ever since version 5, peakfit.m has been capable of fitting multiple peak types. Just enter the peak shape as a vector of peak shape numbers, and also use a vector for the "extra" variable. For example, to fit with a mode consisting of a Lorentzian plus a BWF peak with a Fano (asymmetry) factor of 5:

[FitResults,MeanFitError,Baseline]=peakfit([x;y],0,0,2,[2 15],[0 5],10,0,3)

Comments and Ratings on Tom's Files View all
Updated File Comment by Comments Rating
21 Aug 2014 Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver O'Haver, Tom

Ali, I can work on that. What's the specifications of your peaks: shape, height ratio, x-positions, and widths? How much noise? Are both peaks important in your work, or only the smaller one?

21 Aug 2014 Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver Ali

Not smart enough to recognize real peaks. If you have very small peak before a very large peak, this function will fits the first one, not the second. Thanks for your hard work and sharing.

04 Aug 2014 iSignal 3.4 Interactive smoothing, differentiation, peak sharpening and measurement of time-series signals. Author: Tom O'Haver Feng

Tom, this is a great tool!! Thanks very much for sharing it!!!

28 Jul 2014 Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver He, Jade

Thank you for your reply. I really want to thank you, but there is not that much I can do. I think I could share with you what I do with your code as a way to thank you.

I am working with MRI images. For my project, I need to calculate the lean muscle and fat within ROI. One method stated in "Distribution and Orientation of Bone in the Human Lumbar Vertebral Centrum" by T.S. Keller. This method requires Gaussian Fit in order to calculate the optimal value for thresholding.

24 Jul 2014 Peak Fitter Command-line peak fitter for time-series signals. Version 5.5, July, 2014 Author: Tom O'Haver O'Haver, Tom

Yes, it's the full width at half maximum (at least for the Gaussian and Lorentzian shapes).

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