对中美贸易进出口2005-2017月度原始数据(未进行对数转换)进行季节调整,采用ARIMA(0 1 1)(0 1 1)乘法模型,出现了如下问题:
ERROR: Multiplicative or log additive seasonal adjustment cannot be performed when preadjustment factors are derived from a regARIMA model for data which have not been log transformed.
Check the values for the power or function arguments of the transform spec and mode of the x11 spec.