TABLE 3.

The number of runs done for each cold storage condition (week 3 and week 4; week 5 and week 6) and browning defect, chocolate browning (CB), and friction browning (FB) of the ‘Regal Seedless’ table grape bunches.

Condition	Runs	PCA	Alpha (α)	Validation kappa score	2nd validation score	Test kappa score
CB: W3and4a	1	n/a	0.01	1.0	0.65	0.59
	2	80	0.1	1.0	n/a	0.71
	3	50	1e–5	1.0	0.656	0.88
	4	50	1e–6	0.93	n/a	0.69
CB: W5and6b	1	n/a	1e–3	1.0	0.47	0.68
	2	30	1e–5	1.0	1.0	0.83
	3	30	1e–7	1.0	1.0	0.80
	4	15	1e–6	1.0	1.0	0.83
FB: W3and4a	1	n/a	1e–2	0.78	n/a	0.37
	2	80	1e–2	1.0	n/a	0.73
	3	50	1e–5	1.0	0.49	0.51
	4	65	1e–9	0.92	0.77	0.47

The number of feature reductions done per principal component analysis (PCA) and the kappa scores for the first and second validations, as well as the test validation, are also shown.

^aWeeks 3 and 4.

^bWeeks 5 and 6.