Month

test

Forecast (无漂移项)

相对误差

Forecast (有漂移项)

相对误差

2021-01

33,558.13

32,844.58

0.021263

33,805.43

0.007369

2021-02

33,863.38

32,883.38

0.02894

33,994.42

0.003870

2021-03

34,013.63

32,917.65

0.032222

34,184.17

0.005014

2021-04

34,157.88

32,947.92

0.035422

34,374.50

0.006342

2021-05

34,168.75

32,974.65

0.034947

34,565.26

0.011604

2021-06

34,281.38

32,998.26

0.037429

34,756.34

0.013855

2021-07

34,474

33,019.11

0.042203

34,947.68

0.013740

2021-08

34,550.25

33,037.53

0.043783

35,139.21

0.017046

2021-09

34,384.63

33,053.79

0.038704

35,330.89

0.027520

2021-10

34,118

33,068.16

0.030771

35,522.68

0.041171