Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


Sarah
Posts:
1
Registered:
12/11/12


Curve fitting errors
Posted:
Dec 11, 2012 4:12 PM


I am attempting to fit a large set of data and locate peaks using a Gaussian function. I am not familiar with Matlab, and have started writing code for it, but I get an error message. "Undefined function 'minus' for input arguments of type 'dataset'"
load('hcldcl25th1.mat') x=hcldcl25th1(:,1); y=hcldcl25th1(:,2); f(1)=2; f(2)=4; f(3)=2798; fittype=(f(1)*exp(((xf(3)).^2.*(4*log(2)))./(f(2).^2)));
f(1), f(2), and f(3) are my initial guesses. What do I need to do, or what am I doing wrong?



