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I am trying to to a fit to simple polynomial function.
However, when I try to use 'poly1' as a fittype it gives: Unrecognized function or variable 'poly1'.
I am using the command form as in the library f = fit(x, y, 'poly1'), or f = fit(x, y, poly1) -nothing works
how is it possible? I though it should be in the library as written here:
Chunru on 11 May 2023
x = (0:0.2:5)';
y = 2*exp(-.2*x) + 0.5 * randn(size(x));
f = fit(x, y, 'poly1');
% check the path of fit
plot(f, x, y)
% f = fit(x, y, poly1) % not working unless poly1='poly1';