Table 3.
Top 10 features ranked high in d’ score and feature importance to differentiate “carried” vs. “ambulation”.
| Rank | Feature | D’ | Feature | Feature Importance |
|---|---|---|---|---|
| 1 | FFT SD of z | 0.64 | SD of VM | 0.039 |
| 2 | z FFT max of z | 0.61 | FFT median of y | 0.034 |
| 3 | FFT SD of x | 0.47 | FFT mean weighted of y | 0.033 |
| 4 | SD of z | 0.45 | FFT median of x | 0.027 |
| 5 | FFT max of z | 0.44 | FFT mean weighted of x | 0.026 |
| 6 | Kurtosis of VM | 0.43 | Max of VM | 0.024 |
| 7 | Min of z | 0.41 | FFT mean of y | 0.021 |
| 8 | Kurtosis of y | 0.39 | Min of MV | 0.020 |
| 9 | Min of VM | 0.36 | FFT mean weight of z | 0.019 |
| 10 | SD of x | 0.33 | Kurtosis of VM | 0.018 |
FFT, fast Fourier transform; SD, standard deviation; VM, vector magnitude.