Table 1.
Comparison of classification accuracy on the same platform using top ranked gene isoforms.
| Feature selection | CV (#) | SVM-RFE (#) | RF_based_FS (#) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Classifier | FC | Equal-W | Equal-F | k-means | FC | Equal-W | Equal-F | k-means | FC | Equal-W | Equal-F | k-means |
| SVM | 97.6 (1000) | 97.6 (600) | 96.4 (500) | 96.4 (600) | 97.6 (1000) | 95.2 (600) | 97.6 (1000) | 97.6 (1000) | 98.8 (150) | 96.4 (70) | 96.4 (200) | 98.8 (150) |
| RF | 94.1 (900) | 95.2 (1000) | 92.9 (800) | 91.7 (600) | 96.4 (900) | 96.4 (1000) | 95.2 (400) | 96.4 (1000) | 95.2 (300) | 94.1 (150) | 92.9 (500) | 92.9 (400) |
| NB | 94.1 (700) | 94.1 (900) | 92.9 (600) | 92.9 (700) | 83.5 (1000) | 83.5 (1000) | 88.2 (80) | 83.5 (1000) | 95.2 (300) | 95.2 (200) | 95.2 (600) | 96.4 (400) |
| PAM | 89.4 (900) | 92.9 (1000) | 91.7 (1000) | 91.7 (1000) | 87.0 (900) | 83.5 (900) | 87.0 (900) | 87.0 (900) | 92.9 (600) | 94.1 (200) | 94.1 (800) | 92.9 (400) |
# Number of variables in the classification model
Comparison of classification methods both trained (257 samples) and tested (85 samples) on exon-array data. The best accuracy (percentage of samples correctly predicted) achieved by each combination of the four classifiers and three feature selection schemes are presented, with number of features used in the best fitted model is shown in parenthesis. The models were built by stepwise addition of feature variables into the model by considering the top 1,000 ranked feature variables. Best accuracy, achieved with the least number of features, is marked in bold for each classification method.