Research Article
PCG Classification Using Multidomain Features and SVM Classifier
Table 11
Rank order of the nine domains based on contribution.
| Rank order | Feature domain (Total num. of features) | Num. of top 10 features | Num. of top 100 features | Num. of top 200 features | Num. of top 300 features |
| 1 | Frequency spectrum of state (308) | 4 | 39 | 115 | 183 | 2 | Energy (47) | 3 | 12 | 16 | 24 | 3 | Entropy (16) | 3 | 8 | 10 | 11 | 4 | Cepstrum (65) | 0 | 14 | 28 | 40 | 5 | Time interval (20) | 0 | 14 | 17 | 17 | 6 | Frequency spectrum of records (27) | 0 | 5 | 5 | 10 | 7 | High-order statistics (16) | 0 | 4 | 4 | 7 | 8 | Cyclostationarity (4) | 0 | 2 | 3 | 4 | 9 | State amplitude (12) | 0 | 2 | 2 | 4 |
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