Table 3.

KNN performance under variable K value with the FFT phase angle

K	Accuracy rate (%)	Computation time (sec)
1	47.3684	0.006459
2	47.3684	0.004232
3	31.5789	0.003207
4	42.1053	0.003746
5	47.3684	0.003096
6	47.3684	0.003887
7	57.8947	0.003187
8	52.6316	0.003562
9	36.8421	0.003119
10	42.1053	0.003630

Bold entries specify the highest accuracy rate and lowest computation time