Fitting to an exponential function from row datas

조회 수: 3 (최근 30일)
friet 2017년 6월 4일
답변: Star Strider 2017년 6월 4일
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
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);
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
hold off

답변 (1개)

Star Strider
Star Strider 2017년 6월 4일
It appears to with:
x0 = [1E-15 -0.1];


Help CenterFile Exchange에서 Get Started with Curve Fitting Toolbox에 대해 자세히 알아보기

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by