e=arima.sim(n=1000,list(order=c(0,0,0))) e1=lag(e,1) e2=lag(e,2)
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2023年五一赛B04快递需求问题分析-无水印word完整.docx
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These lines of code simulate a time series of 1000 observations using the ARIMA model with order (0,0,0), which is equivalent to a white noise process. The second and third lines create two new series, e1 and e2, which are the original series shifted by one and two time periods, respectively. These lagged series can be used as input variables in a regression model to capture the time dependence structure in the original series.
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