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Separability indexes after the reduction based on the scatter matrices and gradual involvement of features from different domains.
| Features analyzed | Dimension | Separability index | |
|---|---|---|---|
| Before | After | ||
| Time domain (x1−5) | 5 | 2 | 2.13 |
| Including frequency domain (x1-10) | 10 | 2 | 3.52 |
| Including time-frequency domain (x1−20) | 20 | 2 | 6.74 |
| Including non-linear analysis (x1−30) | 30 | 2 | 8.78 |
