Fit data to a form other than a simple polynomial

2 views (last 30 days)
I am wondering if it's possible to fit data to fit data to a form than like c1*x^n+c2*x^n-1+...+cn*x+c. Instead, I want to fit data to an equation like c1*x^-3 and so on. How could I do this?

Accepted Answer

John D'Errico
John D'Errico on 30 Oct 2015
My polyfitn tool (on the file exchange) can do it of course. Or several tools from the curve fitting toolbox, the optimization toolbox, the stats tool box. You can do it trivially using backslash.
n = 100;
x = rand(n,1);
y = rand(n,1);
c = [ones(n,1),x,x.^-1]\y
c =
0.49905
-0.098795
0.0043635

More Answers (0)

Categories

Find more on Polynomials in Help Center and File Exchange

Community Treasure Hunt

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

Start Hunting!