Define multiple starting points for two-exponential curve fitting (Curve Fitting Toolbox)
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
J.S.
am 21 Jun. 2018
Beantwortet: Adam Danz
am 26 Jul. 2018
Hi,
I have a set of data on which I need to use the two-exponential decay model 'exp2' from the Curve Fitting Toolbox. When I attempted to call the "fit" function ( f=fit(xCol,yCol,'exp2','StartPoint',[maxX,maxY])), MATLAB told me I needed 4 starting points for this model. What is the proper syntax for specifying these? I tried:
f=fit(xCol,yCol,'exp2','StartPoint',[maxX1,maxY1,maxX2,maxY2,maxX3,maxY3,maxX4,maxY4])), but MATLAB told me I had too many start points.
Thanks in advance!
0 Kommentare
Akzeptierte Antwort
Adam Danz
am 26 Jul. 2018
If you're fitting a 2-term exponential model such as
f2(x) = a*exp(b*x) + c*exp(d*x)
you'll need 4 starting points (a,b,c,d). In your examples above, you provide 2 and 8 starting points. Your formatting them correctly into a vector but you just need 4 of them.
0 Kommentare
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Linear and Nonlinear Regression 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!