Table 3. Confusion matrix of test set.

Hypothesized class	True class
	NSE	BE	EAC	ESCC	Total
NSE	45	2	1	0	48
BE	1	29	2	0	32
EAC	1	3	71	1	76
ESCC	0	0	2	29	31
Correct	45	29	71	29	174
Total	47	34	76	30	187
Accuracy rate (%)	95.74	85.29	93.42	96.67	93.05