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Code covered by the BSD License

lorentzian(x,position,width) ...
norm(q-yobsd);
CalculateTfit(x,y,InstFunctio... Performs calculation and plots graph for DemoTFit
TFit3A1(n,h) Changes absorbance when the A1 slider is moved.
TFit3A2(n,h) Changes absorbance when the A2 slider is moved.
TFit3A3(n,h) Changes absorbance when the A3 slider is moved.
TFit3InstWidth(n,h) Changes absorbance when the A1 slider is moved.
TFit3Noise(n,h) Changes absorbance when the Noise slider is moved.
TFit3Redraw(x,y,InstFunction,... Performs calculation and plots graph for TFit3
TFit3separation(n,h) Changes absorbance when the separation slider is moved.
TFitSliders1(n,h) Changes absorbance when the Peak Abs slider is moved.
TFitSliders2(n,h) Changes SpectralBandpass when the InstWidth slider is moved.
TFitSliders3(n,h) Changes linewidth when the AbsWidth slider is moved.
TFitSliders4(n,h) Changes straylight when the straylight slider is moved.
TFitSliders5(n,h) Recalculates NoiseArray when the Noise slider is moved.
broaden(y,a,fa) Function to convolute y by a (whose Fourier transform is fa),
exp(-((x-pos)./(0.6006.*wid))...
lorentzian(x,position,width) ...
lorentzian(x,position,width) ...
norm(q-yobsd);
rtslid(fig,f,hh,varargin) RTSLID Slider widget that responds to dragging realtime
DemoTFit.m
Redraw.m
TFit3.m
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4.5 | 2 ratings Rate this file 8 Downloads (last 30 days) File Size: 31.23 KB File ID: #11970

Method for quantitative absorption spectroscopy, version 2.1

14 Aug 2006 (Updated 07 Nov 2011)

A computational method for quantitative analysis by multiwavelength absorption spectroscopy

File Information
Description	A computational method for quantitative analysis by multiwavelength absorption spectroscopy, called the Tfit method, based on fitting a model of the instrumentally-broadened transmission spectrum to the observed transmission data. It has the advantages of wider dynamic range and greatly improved calibration linearity, compared to conventional methods. Run TFitDemo.m to see how it works. Version 2.1 Press K to display list of all keyboard commands. See http://www.wam.umd.edu/~toh/spectrum/TFit.html for more details.
MATLAB release	MATLAB 7.8 (R2009a)
Other requirements	none

Tags for This File
Everyone's Tags	absorption spectroscopy, analytical, calibration, chemistry(2), mixture, physics
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Comments and Ratings (2)
24 Oct 2006	kwamena Halm	great document. will like to subscribe to this newsgroup
01 Nov 2011	Sahrul Hidayat	very useful program. Thanks for sharing

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Updates
16 Aug 2006	Change to file details (title, description, requirements, ...) Bug fixes
15 Sep 2006	Change to file details (title, description, requirements, ...)
27 Sep 2006	Change to file description.
18 Sep 2009	Slider function modified by commenting out lines 337 and 373 to prevent crash on Matlab 2008 and 2009.
01 Aug 2011	Now includes Keyboard-operated versions TFitDemo.m and TFit3Demo.m that work correctly in later versions of Matlab.
29 Sep 2011	TFitDemo.m now includes a statistics and calibration curve function.
07 Nov 2011	Version 2.1, November 2011, adds SNR calculation; W key to switch between Transmission and Absorbance display.