A Novel Discrete Grey Model and Its Application

Table 3

Fitted and predicted values obtained by different grey system models.

Raw data	GM(1,1)	FGM(1,1)	DGM(1,1)	FDGM(1,1)
1931
1724	1715.06	1714.10	1716.98	1715.76
1517	1522.70	1522.32	1524.19	1523.58
1345	1351.92	1352.01	1353.04	1352.93
1207	1200.29	1200.74	1201.12	1201.39
1069	1065.67	1066.40	1066.25	1066.83
MAPE	0.46	0.38	0.45	0.37
RMSE	43.28	37.06	41.57	35.28
952	946.15	947.09	946.52	947.34
848	840.03	841.13	840.24	841.23
MAPE	0.77	0.67	0.75	0.65
RMSE	48.81	35.61	45.10	33.77