defining a fitting type
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I have written a funcion called Even_fit.m and there are 5 coefficients that need to be found from the fit (a,b,c,d,f) and there is one variable N that I want to load from the workspace, which is already fixed before fitting. My question is how I can load this variable in the fit, since when I do:
ft_even = fittype("Even_fit(x,a,b,c,d,f,N)");
It will also take N as a fitting coefficient, which I do not want.
Thank you!
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채택된 답변
Torsten
2023년 1월 12일
편집: Torsten
2023년 1월 12일
My guess is
fitType = @(x,a,b,c,d,f)Even_fit(x,a,b,c,d,f,N);
fit(x,y,fitType)
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Torsten
2023년 1월 16일
편집: Torsten
2023년 1월 16일
Put the vector of the independent variable to the end of the input list for your function "EvenFit":
x = linspace(0,1,10).';
y = 3*x.^2 + 0.1*rand(10,1);
n = 12;
fitType = @(a,b,c,x)Even_fit(x,a,b,c,n);
sol = fit(x,y,fitType)
plot(sol,x,y)
function yfit = Even_fit(x,a,b,c,n)
yfit = a*x.^2+b*x+c;
end
추가 답변 (1개)
Steven Lord
2023년 1월 12일
See the "Create Custom Nonlinear Models and Specify Problem Parameters and Independent Variables" and "Use Anonymous Functions to Work with Problem Parameters and Workspace Variables" examples on the fittype documentation page.
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