Table 4.
Misclassification rates based on random splitting
| Leukemia | q = 1 | q = 2 | q = 3 | q = 5 | q = 10 | q = 15 | q = 20 |
| Nearest neighbor | 6.58% | 4.62% | 4.21% | 3.75% | 3.33% | 3.38% | 3.25% |
| Aggregated trees | 6.58% | 6.12% | 3.71% | 3.54% | 2.79% | 2.71% | 2.62% |
| Breast | q = 1 | q = 2 | q = 3 | q = 5 | q = 10 | q = 15 | q = 20 |
| Nearest neighbor | 1.00% | 0.75% | 0.75% | 1.00% | 0.83% | 1.00% | 1.00% |
| Aggregated trees | 1.00% | 1.58% | 1.67% | 2.33% | 2.58% | 2.42% | 3.00% |
| Prostate | q = 1 | q = 2 | q = 3 | q = 5 | q = 10 | q = 15 | q = 20 |
| Nearest neighbor | 14.47% | 11.68% | 9.62% | 7.97% | 7.26% | 6.94% | 6.91% |
| Aggregated trees | 14.47% | 16.47% | 10.32% | 8.79% | 8.12% | 8.00% | 7.79% |
| Colon | q = 1 | q = 2 | q = 3 | q = 5 | q = 10 | q = 15 | q = 20 |
| Nearest neighbor | 23.35% | 20.35% | 19.10% | 16.95% | 16.45% | 16.05% | 15.95% |
| Aggregated trees | 23.35% | 21.80% | 19.70% | 18.10% | 16.95% | 16.20% | 16.45% |
| SRBCT | q = 1 | q = 2 | q = 3 | q = 5 | q = 10 | q = 15 | q = 20 |
| Nearest neighbor | 1.33% | 0.48% | 0.43% | 0.48% | 0.76% | 0.95% | 1.05% |
| Aggregated trees | 5.76% | 0.95% | 0.71% | 1.10% | 1.76% | 1.90% | 2.14% |
| Lymphoma | q = 1 | q = 2 | q = 3 | q = 5 | q = 10 | q = 15 | q = 20 |
| Nearest neighbor | 2.15% | 2.20% | 1.50% | 0.85% | 0.65% | 0.50% | 0.50% |
| Aggregated trees | 3.45% | 2.45% | 1.40% | 0.80% | 0.25% | 0.20% | 0.30% |
| Brain | q = 1 | q = 2 | q = 3 | q = 5 | q = 10 | q = 15 | q = 20 |
| Nearest neighbor | 31.21% | 27.50% | 26.36% | 24.71% | 23.86% | 23.71% | 23.36% |
| Aggregated trees | 35.43% | 28.43% | 24.43% | 22.14% | 19.64% | 18.29% | 16.86% |
| NCI | q = 1 | q = 2 | q = 3 | q = 5 | q = 10 | q = 15 | q = 20 |
| Nearest neighbor | 45.25% | 40.25% | 37.90% | 34.80% | 32.10% | 30.50% | 29.65% |
| Aggregated trees | 51.85% | 42.35% | 38.05% | 34.05% | 29.30% | 27.75% | 26.50% |
Misclassification rates for out-of-sample classification with q gene clusters as features, based on N = 100 random divisions into learning set (two thirds of the data) and test set (one third of the data).