|
涉后阶数要合理定义,通常采用AIC准则来确定,有时还需兼顾其他因素,如系统的稳定性、拟合优度等等。(高铁梅)
但如果你不想如此麻烦,手册也建议采用默认值:You may, for example, select a fixed, user-specified number of lags by entering a number in the User specified field. Alternatively, you may customize the settings for automatic lag selection method. Alternative criteria for evaluating the optimal lag length may be selected via the combo box (Akaike, Schwarz, Hannan-Quinn, Modified Akaike, Modified Schwarz, Modified Hannan-Quinn), and you may limit the number of lags to try in automatic selection by entering a number in the Maximum lags box.
|