Table 2 The detected accuracies of multiclass SVM testing and the conventional epoch-average method in the classification study
Subject index | Multiclass SVM-based method |  |  | The conventional epoch-average method (detection interval = 0.7 sec) | |||
|---|---|---|---|---|---|---|---|
| Â | Accuracies for each class (Numcorrect/Numtotal) | Averaged accuracies (Numcorrect/Numtotal) | Averaged effective epoch lengths (s) | Â | |||
| Â | Class I | Class II | Class III | Class IV | Â | Â | Â |
1 | 97.62% | 98.18% | 94.23% | 94.55% | 96.08% | 0.59 | 82.62% |
(41/42) | (54/55) | (49/52) | (52/55) | (196/204) | |||
2 | 97.96% | 96.00% | 91.30% | 93.62% | 94.79% | 0.63 | 78.06% |
(48/49) | (48/50) | (42/46) | (44/47) | (182/192) | |||
3 | 97.56% | 88.68% | 90.38% | 91.49% | 91.71% | 0.62 | 65.82% |
(40/41) | (47/53) | (47/52) | (43/47) | (177/193) | |||
4 | 95.56% | 100% | 94.34% | 97.37% | 96.79% | 0.64 | 67.86% |
(43/45) | (51/51) | (50/53) | (37/38) | (181/187) | |||
5 | 94.59% | 92.59% | 91.38% | 93.62% | 92.86% | 0.61 | 77.38% |
(35/37) | (50/54) | (53/58) | (44/47) | (182/196) | |||
6 | 94.87% | 97.50% | 95.45% | 93.02% | 95.18% | 0.72 | 64.29% |
(37/39) | (39/40) | (42/44) | (40/43) | (158/166) | |||
7 | 91.43% | 93.48% | 97.73% | 93.35% | 94.64% | 0.71 | 75.00% |
(32/35) | (43/46) | (43/44) | (41/43) | (159/168) | |||
8 | 94.59% | 87.18% | 82.50% | 85.00 | 87.18% | 0.77 | 80.40% |
(35/37) | (34/39) | (33/40) | (34/40) | (136/156) | |||
9 | 91.49% | 96.15% | 93.02% | 97.83% | 94.68% | 0.64 | 70.92% |
(43/47) | (50/52) | (40/43) | (45/46) | (178/188) | |||
10 | 93.62% | 88.64% | 84.44% | 92.86% | 89.89% | 0.67 | 68.39% |
(44/47) | (39/44) | (38/45) | (39/42) | (160/178) | |||
11 | 89.13% | 90.48% | 95.00% | 87.50% | 90.34% | 0.68 | 66.33% |
(41/46) | (38/42) | (38/40) | (42/48) | (159/176) | |||
12 | 92.86% | 91.67% | 91.38% | 90.20% | 91.46% | 0.60 | 71.94% |
(39/42) | (44/48) | (53/58) | (46/51) | (182/199) | |||
13 | 92.31% | 93.18% | 85.71% | 94.00% | 91.28% | 0.62 | 73.98% |
(48/52) | (41/44) | (42/49) | (47/50) | (178/195) | |||
14 | 100% | 91.49% | 95.24% | 87.50% | 93.33% | 0.67 | 65.31% |
(43/43) | (43/47) | (40/42) | (42/48) | (168/180) | |||
15 | 95.56% | 89.80% | 98.11% | 100% | 95.92% | 0.61 | 63.78% |
(43/45) | (44/49) | (52/53) | (49/49) | (188/196) | |||
16 | 95.35% | 98.00% | 100% | 97.50% | 97.70% | 0.69 | 68.88% |
(41/43) | (49/50) | (41/41) | (39/40) | (170/174) | |||
17 | 100% | 91.30% | 90.70% | 95.12% | 94.12% | 0.71 | 74.49% |
(40/40) | (42/46) | (39/43) | (39/41) | (160/170) | |||
18 | 93.62% | 100% | 91.11% | 87.76% | 92.90% | 0.66 | 72.96% |
(44/47) | (42/42) | (41/45) | (43/49) | (170/183) | |||
19 | 93.33% | 92.45% | 93.33% | 97.67% | 94.09% | 0.65 | 60.71% |
(42/45) | (49/53) | (42/45) | (42/43) | (175/186) | |||
20 | 98.08% | 91.11% | 91.84% | 97.78% | 94.76% | 0.63 | 64.80% |
(51/52) | (41/42) | (45/49) | (44/45) | (181/191) | |||
|  | Average (mean ± SD) | 93.49 ± 2.58% | 0.66 ± 0.05 | 70.70 ± 6.06% | |||