Plot - show fitting error
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Hi,
Starting with a set of data points, I use a fitfun function to fit it to a nonlinear scaling function A^x.
Now, I would like to quantify the error of the fits themselves, to understand how the points deviate from the scaling function.
May I ask for any help to do this?
Thanks!
回答（1 个）
darova
2019-3-5
A = 1.9;
x = linspace(0,4,50);
y = A.^x + rand(1,50);
res = fit(x',y','A.^x');
y1 = res.A.^x;
plot(x,y,'.',x,y1)
legend('data','fit')
figure
title('Error')
plot(x,y1-y)
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