Research Article
Feature Reduction Based on Genetic Algorithm and Hybrid Model for Opinion Mining
Table 5
Classification performance of electronics domain reviews.
| |
Class/method | NB | LR | SVM | BSVM | BNB | | Actual neg. | Actual pos. | Acc. (%) | Actual neg. | Actual pos. | Acc. (%) | Actual neg. | Actual pos. | Acc. (%) | Actual neg. | Actual pos. | Acc. (%) | Actual neg. | Actual pos. | Acc. (%) |
| | Unigram | | Predicted neg. | 83 | 17 | 83.00 | 88 | 34 | 88.00 | 75 | 23 | 75.00 | 82 | 14 | 82.00 | 87 | 13 | 87.00 | | Predicted pos. | 17 | 83 | 83.00 | 12 | 66 | 66.00 | 25 | 77 | 77.00 | 18 | 86 | 86.00 | 13 | 87 | 87.00 | | Avg. accuracy | 83.00% | 74.47% | 76.00% | 84.00% | 87.00% (↑) | | Error rate | 17.00% | 23.00% | 24.00% | 16.00% | 13.00% (↓) |
| | Unigram + bigram | | Predicted neg. | 85 | 19 | 85.00 | 89 | 29 | 89.00 | 75 | 19 | 75.00 | 79 | 11 | 79.00 | 87 | 11 | 87.00 | | Predicted pos. | 15 | 81 | 81.00 | 11 | 71 | 71.00 | 25 | 81 | 81.00 | 21 | 89 | 89.00 | 13 | 89 | 89.00 | | Avg. accuracy | 83.00% | 80.00% | 78.00% | 84.00% | 87.00% (↑) | | Error rate | 17.00% | 20.00% | 22.00% | 16.00% | 12.00% (↓) |
|
|
