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How to get a frequency vector in NUFFT MATLAB CODE?

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NGR MNFD
NGR MNFD 2022-7-4
评论： NGR MNFD 2022-7-5
The example is
t = [0:300 500.5:700.5];
S = 2*sin(0.1*pi*t) + sin(0.02*pi*t);
X = S + rand(size(t));
Y = nufft(X,t);
n = length(t);
f = (0:n-1)/n;
plot(f,abs(Y))
The frequency range here is [0,1],
My question is, for a noun-uniform (unknown) signal, How to calculate the frequency range? It is still 'f = (0:n-1)/n'?
I don not know how to get frequency vector for my data,that which is not in the normalized frequency range, In fact, it should be in the real frequency range (due to the non-uniform sampling rate).what the matlab code that i should use?
thanks so much .

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