Fitting to an exponential function from row datas

Question

friet 2017-6-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/343227-fitting-to-an-exponential-function-from-row-datas

回答： Star Strider 2017-6-4

I have a function y dependent on t. I want to fit it to a function of y=a*exp(-b/t) and determine the variables "a" and "b". I write the code below, however, it didn't converge. Any help is appreciated.

Thanks GH

clear all
clc
Data=[300.0092  2.2742e-16
331.0053  2.1617e-15
335.0210  3.0675e-15
361.2484  4.3307e-14]; 
t = Data(:,1);
y = Data(:,2);
plot(t,y,'ro')
title('Data points')
F = @(x,xdata)x(1)*exp(-x(2)*xdata);
x0 = [10^-16 0.001];
[x,resnorm,~,exitflag,output] = lsqcurvefit(F,x0,t,y)
hold on
plot(t,F(x,t))
hold off