時序作業

[d9j06 (ck ck)]

Xt=cos(t/10)+e
e~iidN(0,4)
t=1,...,200

(1)generate data
(2)time series plot
(3)mean
(4)vaiance
(5)autocorrelation function

下禮拜交，作業印出來交給老師

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