Curve start and end coordinates
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Hello,
I have a curve
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1111390/image.jpeg)
I want to find the starting and end coordinates of these gaussian curves.
It would be great if you guys could help!
The required data is attached in this question itself ("req_data.mat").
Thank you!
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回答(1 个)
Matt J
2022-8-29
编辑:Matt J
2022-8-29
Gaussian curves are infinite in length., so it isn't clear what your criterion would be for where they start/stop. However, a good place to start would probably be to use the Curve Fitting Toolbox to fit a three-term Gaussian model ( 'gauss3' ).
s=load('req_data.mat').drt_data;
x=s.tau;
y=s.gamma_tau*1e4;
a=[1.5,0.5,6];
b=[-2,-0.3,1.4];
c=[1,0.5,1];
x0=[a;b;c];
ft=fit(x,y,'gauss3','StartPoint',x0(:).');
plot(ft,x,y)
5 个评论
Image Analyst
2022-8-30
编辑:Image Analyst
2022-8-30
The area in the tails is probably insignificant, therefore simply use the formula for the area of a Gaussian:
From Matt's code you know the 3 amplitudes and 3 standard deviations. It should be accurate enough for your purposes.
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