TABLE 3.

Actual and predicted geographic regions of origin for 261 isolates from chouriço obtained from seven producing areas (Fig. 2)^a

Data set	Predicted region of origin	No. of isolates from actual region of originb:						Total no. of isolates
		TOM	BL	AL	BB	BA	AC
Training	TOM	48	0	0	0	0	0	48
	BL	0	9	0	0	0	0	9
	AL	2	0	60	0	0	0	62
	BB	0	0	0	57	0	0	57
	BA	0	0	0	0	38	0	38
	AC	0	0	0	0	0	14	14
	All	50	9	60	57	38	14	228
Validation	TOM	7	0	3	1	0	0	11
	BL	0	0	1	0	0	0	1
	AL	0	0	7	0	0	0	7
	BB	0	0	1	4	1	1	7
	BA	0	0	1	1	2	0	4
	AC	0	0	0	0	0	1	1
	All	7	0	13	6	3	2	31

^aThe ANN developed had 50 input nodes, 27 hidden nodes, and 6 output nodes. TOM, Trás-os-Montes; BL, Beira Litoral; AL, Alto Alentejo; BB, Beira Baixa; BA, Beira Alta; AC, the Azores. 

^bBoldface numbers are numbers of isolates correctly assigned to their true regions of origin. The numbers of isolates tested were as follows (with the first number being the number for the training data set and the second number being the number for the validation data set): 52 and 9 from Trás-os-Montes, 9 and 2 from Beira Litoral, 60 and 9 from Alto Alentejo, 57 and 6 from Beira Baixa, 38 and 3 from Beira Alta, and 14 and 2 from the Azores.