Table 6.

Classification results of four kernel functions used in the QPSO-KELM model.

Class	Predicted as *
	Gaussian				Linear				Polynomial				Wavelet
	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4
1	20	0	0	0	18	2	0	0	18	2	0	0	19	1	0	0
2	2	18	0	0	2	18	0	0	2	18	0	0	2	18	0	0
3	1	0	18	1	0	0	17	3	1	0	18	1	1	0	18	1
4	0	0	0	20	0	0	5	15	0	0	1	19	0	0	1	19
Total	95.00%				85.00%				91.25%				92.50%