forecast::accuracy()函数中的ME如何提取

Question

我可以使用 accuracy 函数为模型获取一组准确度度量，如下所示：

set.seed(289805)
x <- arima.sim(n=10, model=list(ar=0.8, order=c(1, 0, 0)), sd=1)
mod <- auto.arima(x, ic="aicc")
fit <- fitted(mod) # fit the model with the series
ACCURACY <- forecast::accuracy(fit, x)      # RETURNS ACCURACY
ACCURACY

# RESULT
#                ME     RMSE       MAE      MPE    MAPE      ACF1 Theil's U
#Test set 0.4763398 1.289879 0.8928214 4.748337 71.5307 0.2324054  1.009128

如何只提取结果中的 ME？

Answer 1

输出是一个矩阵，所以你需要使用矩阵子集。

ACCURACY[,"ME"]
[1] 0.4763398

forecast::accuracy()函数中的ME如何提取

How Do I Extract the ME in forecast::accuracy() Function

r

arima

forecast