I want to find the best coefficients for curve fitting for my experiment data
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Misi
am 18 Jul. 2022
Kommentiert: Misi
am 18 Jul. 2022
Greetings
I have experiment data as you can see below, I want to find the curve with the formula of y=K0+K1exp(-t/Tau) which is fit to my experiments data.
I have 'y' and 't' from experiment and I am looking for the best values for K0, K1 and Tau.
the bellow is the graph of my experiment data
0 Kommentare
Akzeptierte Antwort
Image Analyst
am 18 Jul. 2022
You can use fitnlm if you have the stats toolbox. See attached demo and make changes as needed, like reading in your actual data, and renaming variables if you want.
Weitere Antworten (2)
Torsten
am 18 Jul. 2022
Your code ?
Essential in your case is a good starting guess for the parameters.
Try the following code and take the coefficients as initial values for the optimization.
fun = @(K0,K1,tau,t) K0 + K1*exp(-t/tau);
t = 0:0.1:10;
K0 = 1e10;
K1 = 6.2e10;
tau = 4.5;
y = fun(K0,K1,tau,t);
plot(t,y)
Siehe auch
Kategorien
Mehr zu Get Started with Curve Fitting Toolbox finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!