Table 4.
Average percentage of features (and their corresponding standard deviation) used by kNN with different parameters on four microarray data sets (%)
| DATASET | PCAKNN | GAPCAKNN | PLSKNN | GAPLSKNN | PPKNN | GAPPKNN |
| k = 1 for kNN | ||||||
| CNS | 68.5(6.5) | 32.3(8.0) | 69.2(8.0) | 32.2(6.4) | 62.5(7.3) | 32.3(9.1) |
| COLON | 78.2(4.4) | 29.7(7.8) | 58.3(5.2) | 32.8(6.4) | 61.4(9.0) | 34.2(7.2) |
| LEUKEMIA | 68.0(8.8) | 28.6(6.2) | 47.8(7.1) | 31.2(7.6) | 54.3(8.3) | 33.3(6.8) |
| LUNG | 73.4(6.2) | 72.2(7.6) | 78.4(7.2) | 68.9(5.9) | 79.8(8.1) | 71.9(6.9) |
| Average | 72.0(6.5) | 40.7(7.4) | 63.4(6.9) | 41.2(6.6) | 64.5(8.2) | 42.9(7.5) |
| k = 4 for kNN | ||||||
| CNS | 71.2(6.8) | 26.6(7.9) | 68.2(7.8) | 31.6(9.5) | 62.4(9.8) | 23.1(8.2) |
| COLON | 80.3(7.5) | 32.2(6.8) | 59.7(5.2) | 27.3(8.3) | 62.3(8.8) | 32.5(7.5) |
| LEUKEMIA | 81.4(6.9) | 26.7(5.7) | 46.8(8.8) | 35.5(7.1) | 50.7(7.3) | 33.2(6.0) |
| LUNG | 78.2(8.7) | 71.2(6.3) | 74.7(6.0) | 69.3(4.1) | 80.2(8.9) | 70.0(6.2) |
| Average | 77.7(7.5) | 39.1(6.7) | 62.3(6.9) | 40.9(7.2) | 63.9(8.7) | 39.7(7.0) |
| k = 7 for kNN | ||||||
| CNS | 72.8(7.1) | 29.4(8.2) | 61.7(8.8) | 32.3(6.1) | 68.1(10.3) | 32.0(8.8) |
| COLON | 81.2(8.3) | 25.7(7.7) | 52.4(6.3) | 36.7(5.7) | 65.4(8.9) | 33.4(7.3) |
| LEUKEMIA | 79.1(6.9) | 28.9(6.5) | 48.9(9.1) | 32.1(6.8) | 51.3(9.1) | 32.7(6.1) |
| LUNG | 80.0(5.2) | 72.5(8.7) | 78.3(7.4) | 62.9(7.6) | 82.7(9.2) | 80.9(5.8) |
| Average | 78.2(6.9) | 39.1(7.8) | 60.3(7.9) | 41.0(6.6) | 66.8(9.4) | 44.7(7.0) |