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时间序列模型ARIMA分析中ma的系数为-1说明什么?/
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arima(x = f3sdiff, order = c(1, 1, 1))
Coefficients:
ar1 ma1
-0.5341 -1.000
s.e. 0.2005 0.191
sigma^2 estimated as 0.0006113: log likelihood = 32.25, aic = -58.5
...
2016-3-30 00:48 - buaa2013 - R语言论坛