Rank: 64 based on 677 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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26 Apr 2013 Screenshot iPeak: Interactive Peak Detector (Version 5.3) Keypress operated interactive peak detector function. Author: Tom O'Haver peak detection, analytical chemistry, instrumental analysis, chemistry, physics, signal processing 81 16
  • 4.8
4.8 | 5 ratings
27 Mar 2013 Screenshot iSignal 2.7 Interactive smoothing, differentiation, peak sharpening and measurement of time-series signals. Author: Tom O'Haver signal processing, data import, chemistry, data exploration, medical, pharmaceutical 56 4
  • 5.0
5.0 | 2 ratings
19 Mar 2013 Screenshot Interactive Peak Fitter (Version 9.2) Keyboard operated peak fitting function for time-series signals. Author: Tom O'Haver chemistry, curve fitting, peak fitting, physics, time series, decomposition 47 21
  • 3.0
3.0 | 4 ratings
21 Feb 2013 Screenshot Peak Fitter Command-line peak fitter for time-series signals. Version 3.6: February, 2013. Author: Tom O'Haver statistics, signal processing, decomposition, peak fitting, physics, time series 139 54
  • 4.3
4.3 | 10 ratings
28 Dec 2012 Screenshot Peak finding and measurement Function to locate and measure the positive peaks and valleys in noisy data sets. Author: Tom O'Haver peak detection, analytical chemistry, chemistry, physics, instrumental analysis, tom 161 31
  • 4.78947
4.8 | 20 ratings
Comments and Ratings by Tom View all
Updated File Comments Rating
26 Apr 2013 Peak Fitter Command-line peak fitter for time-series signals. Version 3.6: February, 2013. Author: Tom O'Haver

Ben, not so far, but it's an interesting possibility. Can you give me an example of a 2D data set with peaks and the kind of information your would like to obtain from a 2D peak fitter program?

19 Mar 2013 Interactive Peak Fitter (Version 9.2) Keyboard operated peak fitting function for time-series signals. Author: Tom O'Haver

Version 9.2, uploaded today, has bug fixes; fixed-position Gaussians (shape 16) and fixed-position Lorentzians (shape 17); adds a peak shape selection menu (activated by the '-' key).

21 Feb 2013 Peak Fitter Command-line peak fitter for time-series signals. Version 3.6: February, 2013. Author: Tom O'Haver

Version 3.6: February, 2013. Addition of fixed-position Gaussian (shape 16) and fixed-position Lorentzian (shape 17). See example 19 on http://terpconnect.umd.edu/~toh/spectrum/InteractivePeakFitter.htm.

18 Feb 2013 Peak Fitter Command-line peak fitter for time-series signals. Version 3.6: February, 2013. Author: Tom O'Haver

So I guess It's about that that I add such a capability. I'll work on it and try to have something together in a few days.

18 Feb 2013 Peak Fitter Command-line peak fitter for time-series signals. Version 3.6: February, 2013. Author: Tom O'Haver

Thanks, Rems. Normally the easy way to add a new peak type to either peakfit.m or its interactive cousin ipf.m is to cannibalize one of the other shapes that you are not using and that has the same variable structure. Unfortunately none of my current peak types have separate fixed parameters for each peak, so it's a non-trivial job. Do you want the peak widths to be individually fit by the program or do you want all of the widths to be constrained to be equal? If all the widths were preset and fixed, and only the peak heights needed to be fit, then the problem is MUCH simpler and you use multilinear regression to obtain an instant solution (http://terpconnect.umd.edu/~toh/spectrum/CurveFittingB.html).

Comments and Ratings on Tom's Files View all
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29 Apr 2013 Peak Fitter Command-line peak fitter for time-series signals. Version 3.6: February, 2013. Author: Tom O'Haver Ben

Hi Tom,

Thanks for your reply!

What do you think some basic 2D shape, such as Gaussian, elongated Gaussian (Gabor), high peak and (approximately) pole with half sphere on the top?

I will send you an example data later. The data belong to my old project.

Thanks in advance!
Ben

26 Apr 2013 Peak Fitter Command-line peak fitter for time-series signals. Version 3.6: February, 2013. Author: Tom O'Haver O'Haver, Tom

Ben, not so far, but it's an interesting possibility. Can you give me an example of a 2D data set with peaks and the kind of information your would like to obtain from a 2D peak fitter program?

26 Apr 2013 Peak Fitter Command-line peak fitter for time-series signals. Version 3.6: February, 2013. Author: Tom O'Haver Ben

Do you have a 2D version of this peak fitter?

22 Mar 2013 Peak finding and measurement Function to locate and measure the positive peaks and valleys in noisy data sets. Author: Tom O'Haver Dan

Tom, it works very well for me. Thank you!
The start and the end position of the peaks would also help me… the definition of 1% of the peak amplitude would be great.

19 Mar 2013 Interactive Peak Fitter (Version 9.2) Keyboard operated peak fitting function for time-series signals. Author: Tom O'Haver O'Haver, Tom

Version 9.2, uploaded today, has bug fixes; fixed-position Gaussians (shape 16) and fixed-position Lorentzians (shape 17); adds a peak shape selection menu (activated by the '-' key).

Top Tags Applied by Tom
chemistry, physics, signal processing, analytical chemistry, spectroscopy
Files Tagged by Tom View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
26 Apr 2013 Screenshot iPeak: Interactive Peak Detector (Version 5.3) Keypress operated interactive peak detector function. Author: Tom O'Haver peak detection, analytical chemistry, instrumental analysis, chemistry, physics, signal processing 81 16
  • 4.8
4.8 | 5 ratings
27 Mar 2013 Screenshot iSignal 2.7 Interactive smoothing, differentiation, peak sharpening and measurement of time-series signals. Author: Tom O'Haver signal processing, data import, chemistry, data exploration, medical, pharmaceutical 56 4
  • 5.0
5.0 | 2 ratings
19 Mar 2013 Screenshot Interactive Peak Fitter (Version 9.2) Keyboard operated peak fitting function for time-series signals. Author: Tom O'Haver chemistry, curve fitting, peak fitting, physics, time series, decomposition 47 21
  • 3.0
3.0 | 4 ratings
21 Feb 2013 Screenshot Peak Fitter Command-line peak fitter for time-series signals. Version 3.6: February, 2013. Author: Tom O'Haver statistics, signal processing, decomposition, peak fitting, physics, time series 139 54
  • 4.3
4.3 | 10 ratings
28 Dec 2012 Screenshot Peak finding and measurement Function to locate and measure the positive peaks and valleys in noisy data sets. Author: Tom O'Haver peak detection, analytical chemistry, chemistry, physics, instrumental analysis, tom 161 31
  • 4.78947
4.8 | 20 ratings

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