Rank: 42 based on 672 downloads (last 30 days) and 23 files submitted
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Tom O'Haver

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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
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(last 30 days) 		Comments Rating
19 Jan 2012 Screenshot Interactive Peak Fitter (Version 7.1) Keyboard operated peak fitting function for time-series signals. Author: Tom O'Haver chemistry, curve fitting, peak fitting, physics, time series, decomposition 46 16
  • 3.0
3.0 | 3 ratings
19 Jan 2012 Screenshot Peak Fitter Command-line peak fitter for time-series signals. Version 2.3: Jan 2012. Author: Tom O'Haver chemistry, curve fitting, decomposition, peak fitting, physics, time series 129 23
  • 4.2
4.2 | 5 ratings
15 Nov 2011 Screenshot iSignal 1.9 Interactive smoothing, differentiation, and peak sharpening of time-series signals. Author: Tom O'Haver signal processing, data import, chemistry, data exploration, medical, pharmaceutical 35 1
  • 5.0
5.0 | 1 rating
07 Nov 2011 Screenshot Method for quantitative absorption spectroscopy, version 2.1 A computational method for quantitative analysis by multiwavelength absorption spectroscopy Author: Tom O'Haver chemistry, analytical, absorption spectrosco..., physics, calibration, mixture 15 2
  • 4.5
4.5 | 2 ratings
04 Nov 2011 Screenshot Diffraction grating, version 2 Aids for learning and teaching about the principles of diffraction gratings. Author: Tom O'Haver chemistry, physics, optics, spectroscopy, interference, analytical chemistry 30 0
Comments and Ratings by Tom View all
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07 Jan 2012 Peak Fitter Command-line peak fitter for time-series signals. Version 2.3: Jan 2012. Author: Tom O'Haver

Thanks for the careful evaluation and feedback, Bogdan. I'll look into the "close to the edge" problem and see if I can either bypass the problem or add zero padding as an option.
04 Nov 2011 Peak Fitter Command-line peak fitter for time-series signals. Version 2.3: Jan 2012. Author: Tom O'Haver

AM, I just checked it, and these examples are working just fine on my system (Matlab 7.8 R2009a). This error is thrown by the built-in "linspace" function, not by my peakfit.m function. I'm at a loss to understand what is going on on your system. Could there be that much difference between R2009a and R2009b?
04 Nov 2011 Peak Fitter Command-line peak fitter for time-series signals. Version 2.3: Jan 2012. Author: Tom O'Haver

AM, I think you are using the wrong function. In the current version of my peakfit.m (version 2.2), line 23 is a comment line. There is no line reading "x = x2fx((0:n-2)');" in any of my code. Download a fresh copy of the current version and try again.
11 Oct 2011 plotdata, version 2 A simple data plotting function, useful for plotting x,y data and polynomial fitting. Author: Tom O'Haver

This function replaces and extends my earlier "plotfit" function, whose name conflicted with the name of a Matlab-supplied function.

16 Sep 2011 Interactive Peak Fitter (Version 7.1) Keyboard operated peak fitting function for time-series signals. Author: Tom O'Haver

Re: Mark Shore's comment. I agree; I guess I'm a retrograde kind of guy. I've considered creating a GUI, but attempts so far have not produced anything I like better than the single-key commands. It's quicker to hit one key than to hold down the Ctrl-key and another key to select a drop-down menu item.
Comments and Ratings on Tom's Files View all
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07 Jan 2012 Peak Fitter Command-line peak fitter for time-series signals. Version 2.3: Jan 2012. Author: Tom O'Haver O'Haver, Tom

Thanks for the careful evaluation and feedback, Bogdan. I'll look into the "close to the edge" problem and see if I can either bypass the problem or add zero padding as an option.
06 Jan 2012 Peak Fitter Command-line peak fitter for time-series signals. Version 2.3: Jan 2012. Author: Tom O'Haver Dzyubak, Bogdan

Does a pretty good job. May require zero padding to work if one of your peaks is close to the edge of data. In my case it would only fit one peak no matter how many I specified until I zero padded around my data.
I briefly tried using window+center for the same effect but didn't get the same result.

04 Dec 2011 Fast smoothing function Fast smoothing function for time-series data Author: Tom O'Haver Dijemeni, Esuabom

How can I apply fastsmooth to an image?

I am new to image processing in Matlab.
04 Nov 2011 Peak Fitter Command-line peak fitter for time-series signals. Version 2.3: Jan 2012. Author: Tom O'Haver AM

I read your last comment first, and check my linspace function and it does not have a default value of 100 points between values if non is specified. So I just put it in as 100 and it works! Not sure why my linspace is different. But I will also download the most current version as well.
Thanks!

04 Nov 2011 Peak Fitter Command-line peak fitter for time-series signals. Version 2.3: Jan 2012. Author: Tom O'Haver O'Haver, Tom

AM, I just checked it, and these examples are working just fine on my system (Matlab 7.8 R2009a). This error is thrown by the built-in "linspace" function, not by my peakfit.m function. I'm at a loss to understand what is going on on your system. Could there be that much difference between R2009a and R2009b?
Top Tags Applied by Tom
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chemistry, physics, signal processing, analytical chemistry, spectroscopy
Files Tagged by Tom View all
  • 1 - 5 of
  • 23
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
19 Jan 2012 Screenshot Interactive Peak Fitter (Version 7.1) Keyboard operated peak fitting function for time-series signals. Author: Tom O'Haver chemistry, curve fitting, peak fitting, physics, time series, decomposition 46 16
  • 3.0
3.0 | 3 ratings
19 Jan 2012 Screenshot Peak Fitter Command-line peak fitter for time-series signals. Version 2.3: Jan 2012. Author: Tom O'Haver chemistry, curve fitting, decomposition, peak fitting, physics, time series 129 23
  • 4.2
4.2 | 5 ratings
15 Nov 2011 Screenshot iSignal 1.9 Interactive smoothing, differentiation, and peak sharpening of time-series signals. Author: Tom O'Haver signal processing, data import, chemistry, data exploration, medical, pharmaceutical 35 1
  • 5.0
5.0 | 1 rating
07 Nov 2011 Screenshot Method for quantitative absorption spectroscopy, version 2.1 A computational method for quantitative analysis by multiwavelength absorption spectroscopy Author: Tom O'Haver chemistry, analytical, absorption spectrosco..., physics, calibration, mixture 15 2
  • 4.5
4.5 | 2 ratings
04 Nov 2011 Screenshot Diffraction grating, version 2 Aids for learning and teaching about the principles of diffraction gratings. Author: Tom O'Haver chemistry, physics, optics, spectroscopy, interference, analytical chemistry 30 0

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