Table 3.

Evaluation of NCE predictions for each of the training systems. Values of RMSE, the percentage corresponding to a systematic error (RMSE_s), a randomly distributed error (RMSE_u), index of agreement (d) and the slope and intercept of the regression between observed and predicted were calculated on an hourly basis. The same indexes were calculated for the daily integrated values (Daily_total). ‘Syrah’, Montpellier 2009

	RMSE	RMSEs	RMSEu	d	Slope	Intercept
VSPl	2.58	48 %	52 %	0.94	0.77	0.60
VSPhs	2.50	10 %	90 %	0.97	0.89	0.74
VSPh	4.73	49 %	51 %	0.92	0.76	0.49
LSW	1.51	23 %	77 %	0.97	0.94	0.99
Total*	2.80	25 %	75 %	0.95	0.82	0.84
Daily total †	0.09	48 %	52 %	0.84	0.51	0.22

* N _total: 445 points. The hourly RMSE is in µmol m⁻² s⁻¹.

^† N _daily: 25 d. The daily RMSE is in mol m⁻² d⁻¹.