拟合值与残差
R 中的预测
Rob J. Hyndman
Professor of Statistics at Monash University
示例：石油产量
fc <- naive(oil)
autoplot(oil, series = "Data") + xlab("Year") +
autolayer(fitted(fc), series = "Fitted") +
ggtitle("Oil production in Saudi Arabia")
示例：石油产量
autoplot(residuals(fc))
checkresiduals()
checkresiduals(fc)
Ljung-Box test
data: residuals
Q* = 12.59, df = 10, p-value = 0.2475
Model df: 0. Total lags used: 10
