Table 2. Effect of the number of features on the classification accuracy rate of V-ELM.

Number of features (p)	Sn (%)	Sp (%)
4	91.0	89.1
5	91.2	90.2
10	91.5	90.7
15	92.4	90.9.
20	92.6	91.0
25	93.1	91.6
30	93.4	92.5
35	93.2	92.1
40	93.1	92.0
45	93.4	92.2
50	93.3	92.3
55	93.4	92.1
60	93.2	92.4
86	92.9	92.3