187****02062024-11-03 21:27:15
easonality is included in an ARMA model by multiplying the short-run lag polynomial by a seasonal lag polynomial.什么意思啊?
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黄石2024-11-06 14:48:34
同学你好。这个知识点的话涉及得比较深了。Seasonality如果细分可以分为deterministic seasonality和stochastic seasonality,其中deterministic seasonality不平稳,是用哑变量方法进行建模,stochastic seasonality有时是平稳的,此时可以用ARMA模型进行建模。从考试的角度来说稍微了解一下就可以。
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