Table 3 Case 2: Forecasting results of different grey models45.
From: Forecasting of energy consumption by G20 countries using an adjacent accumulation grey model
Year | Actual value | GM6(1,1) | RPE % | GM4(1,1) | RPE % | DAGM (1,1)10 | RPE % |
|---|---|---|---|---|---|---|---|
2000 | 132.4 | 132.4 | 0 | – | – | 132.4 | 0 |
2001 | 144.6 | 142 | 1.79806 | – | – | 142.3 | 1.59059 |
2002 | 156.3 | 157.3 | 0.639795 | 156.3 | 0 | 155.8 | 0.3199 |
2003 | 1737 | 174.2 | 0.287853 | 172.1 | 0.92113 | 172.2 | 0.86356 |
2004 | 190.2 | 193 | 1.472135 | 192.5 | 1.209253 | 192.1 | 0.998948 |
2005 | 216.7 | 213.8 | 1.33826 | 215.3 | 0.64605 | 216.2 | 0.23073 |
RMSE | – | 1.12 | – | 0.93 | – | 0.66 | – |
MAE | – | 1.63 | – | 1.33 | – | 1.12 | – |
MAPE | – | 2.01 | – | 1.57 | – | 1.39 | – |
2006 | 249.4 | 236.8 | 5.05213 | 240.8 | 3.44828 | 245.4 | 1.60385 |
RMSE | – | 5.04 | – | 3.46 | – | 1.61 | – |
MAE | – | 12.6 | – | 8.6 | – | 4 | – |
MAPE | – | 12.6 | – | 8.6 | – | 4 | – |
