Table 3.
Statistical classification error rates (and their corresponding standard deviation) by using kNN with different different parameters on four microarray data sets (%)
| DATASET | KNN | PCAKNN | GAPCAKNN | PLSKNN | GAPLSKNN | PPKNN | GAPPKNN |
| k = 1 for kNN | |||||||
| CNS | 47.5(3.5) | 43.8(8.7) | 40.8(10.2) | 44.9(9.3) | 36.4(10.7) | 44.9(10.3) | 34.3(8.3) |
| COLON | 32.5(1.4) | 28.4(8.4) | 27.1(10.3) | 24.8(14.3) | 21.9(7.5) | 30.2(12.2) | 18.2(7.2) |
| LEUKEMIA | 16.1(2.2) | 14.7(10.8) | 11.4(8.7) | 15.7(10.4) | 12.3(8.6) | 15.9(11.9) | 8.4(6.4) |
| LUNG | 17.6(2.3) | 11.8(7.1) | 11.0(4.6) | 11.8(5.3) | 6.1(4.7) | 13.2(5.6) | 7.8(4.1) |
| Average | 28.4(2.3) | 24.6(8.7) | 22.57(8.4) | 24.3(9.8) | 19.2(7.8) | 25.3(10.0) | 17.1(6.5) |
| k = 4 for kNN | |||||||
| CNS | 48.6(1.2) | 46.5(11.2) | 41.5(11.0) | 44.9(9.9) | 38.4(10.8) | 47.8(9.9) | 38.5(8.7) |
| COLON | 44.6(2.8) | 42.9(12.9) | 36.2(9.2) | 35.3(14.3) | 28.8(8.8) | 34.9(13.7) | 24.5(8.4) |
| LEUKEMIA | 32.5(1.9) | 31.5(14.1) | 28.1(11.9) | 15.5(9.6) | 14.8(14.9) | 18.6(11.5) | 10.0(7.8) |
| LUNG | 16.2(0.8) | 15.8(4.6) | 13.5(4.8) | 12.6(6.3) | 10.1(4.8) | 13.4(6.5) | 9.4(3.5) |
| Average | 35.4(1.7) | 34.1(10.7) | 28.8(9.2) | 27.0(10.0) | 23.0(8.0) | 28.67(10.4) | 20.6(7.1) |
| k = 7 for kNN | |||||||
| CNS | 46.5(1.4) | 39.1(6.6) | 38.6(6.8) | 41.4(10.3) | 39.4(9.4) | 39.0(9.0) | 31.9(7.6) |
| COLON | 30.9(1.0) | 28.4(8.4) | 26.0(8.3) | 28.3(11.6) | 24.3(8.3) | 25.8(11.0) | 19.5(7.2) |
| LEUKEMIA | 24.3(1.0) | 22.7(10.2) | 17.7(9.1) | 13.5(9.0) | 11.5(8.8) | 12.4(8.0) | 7.0(6.2) |
| LUNG | 16.3(0.6) | 13.2(3.6) | 10.1(3.5) | 11.5(4.1) | 6.5(4.7) | 12.1(5.4) | 7.5(3.61) |
| Average | 29.5(1.0) | 25.8(7.2) | 23.1(6.9) | 23.6(8.7) | 20.4(7.8) | 22.42(8.3) | 16.4(6.2) |