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Autocorrelation sin(2x) function

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aryan ramesh
aryan ramesh 2021-8-3
回答： aryan ramesh 2021-8-3
Hi, I am trying to calculate the autocorrelation of the sin(2t), but I am getting a result different from the expected.
t = -10:0.05:10;
y = sin(2*t);
b = autocorr(y);
figure;
plot(b)
Expected :
found:

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aryan ramesh
aryan ramesh 2021-8-3
The autocorr(y) estimante the (ACF) of the univariate, stochastic time series y with confidence bounds.I was looking for the xcorr() function.

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