ExpDecay3
ExpDecay3-FitFunc
Function
![y=y_0+A_1e^{-(x-x_0)/t_1}+A_2e^{-(x-x_0)/t_2}+A_3e^{-(x-x_0)/t_3} y=y_0+A_1e^{-(x-x_0)/t_1}+A_2e^{-(x-x_0)/t_2}+A_3e^{-(x-x_0)/t_3}](//d2mvzyuse3lwjc.cloudfront.net/doc/de/UserGuide/images/ExpDecay3/math-b30570ff71fad0152980ff90d5fa74bf.png)
Brief Description
Exponential decay 3 with offset.
Sample Curve
![CFF Image168.jpg](//d2mvzyuse3lwjc.cloudfront.net/doc/de/UserGuide/images/ExpDecay3/CFF_Image168.jpg)
Parameters
Number: 8
Names: y0, x0, A1, t1, A2, t2, A3, t3
Meanings: y0 = offset, x0 = center, A1 = amplitude, t1 = decay constant, A2 = amplitude, t2 = decay constant, A3 = amplitude, t3 = decay constant
Lower Bounds: none
Upper Bounds: none
Note: different initial parameters are used for t1, t2 and t3 so as to make sure t3 > t2 > t1 in the fitting results.
Script Access
nlf_expdecay3(x,y0,x0,A1,t1,A2,t2,A3,t3)
Function File
FITFUNC\EXPDECY3.FDF
Category
Exponential
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