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Feature number | Description | Equation (notation) |
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4–6 | Acceleration (-, -, and -axes) | |
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7–9 | Gyroscope (-, -, and -axes) | |
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10–15 | Moving variance of 100 samples of acceleration and gyroscope data | , here |
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16-17 | Movement intensity of acceleration and gyroscope data |
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18 | Movement intensity of difference between acceleration and gyroscope data | |
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19–21 | Moving variance of 100 samples of movement intensity data | , here |
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22–24 | Polar coordinates of acceleration data | , ,
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25–27 | Polar coordinates of gyroscope data | , ,
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28–30 | Polar coordinates of difference between acceleration and gyroscope data | , ,
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31 | Simple moving average of acceleration data | |
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32 | Simple moving average of gyroscope data | |
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33 | Simple moving average of difference between acceleration and gyroscope data | |
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34 | First eigenvalue of moving covariance between acceleration data | |
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35 | First eigenvalue of moving covariance between gyroscope data | |
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36 | First eigenvalue of moving covariance of difference between acceleration and gyroscope data | |
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37–42 | Moving energy of acceleration and gyroscope data | , here |
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43–48 | Difference between moving maximum and moving minimum of acceleration and gyroscope data | , here |
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49 | Moving correlation between - and -axis of acceleration data | |
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50 | Moving correlation between -axis and -axis of acceleration data | |
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51 | Moving correlation between -axis and -axis of acceleration data | |
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52 | Moving correlation between -axis and -axis of gyroscope data | |
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53 | Moving correlation between -axis and -axis of gyroscope data | |
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54 | Moving correlation between -axis and -axis of gyroscope data | |
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55–57 | Projection of gyroscope data onto acceleration data | |
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58 | Moving mean of orientation vector of acceleration data | , here |
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59 | Moving variance of orientation vector of acceleration data | , |
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60 | Moving energy of orientation vector of acceleration data | , here |
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61–63 | Moving energy of difference between acceleration and gyroscope data | , here , |
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64 | Moving energy of difference between -axis and -axis of acceleration data | |
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65 | Moving energy of difference between -axis and -axis of acceleration data | |
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66 | Moving energy of difference between -axis and -axis of acceleration data | |
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67 | Moving mean of orientation vector of difference between acceleration and gyroscope data | , here |
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68 | Moving variance of orientation vector of difference between acceleration and gyroscope data | , |
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69 | Moving energy of orientation vector of difference between acceleration and gyroscope data | , here |
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70 | Moving mean of orientation vector of gravity data | , here |
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71 | Moving variance of orientation vector of gravity data | , |
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72 | Moving energy of orientation vector of gravity data | , here |
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73 | Moving mean of orientation vector of difference between acceleration and gravity data | , |
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74 | Moving variance of orientation vector of difference between acceleration and gravity data | ,
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75 | Moving energy of orientation vector of difference between acceleration and gravity data | , |
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76–81 | Moving cumulative sum of acceleration and gyroscope data | , here |
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82 | Simple moving average of cumulative sums of acceleration data | |
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83 | Simple moving average of cumulative sums of gyroscope data | |
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84 | Simple moving average of cumulative sums of difference between accelerometer and gyroscope data | |
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85–90 | Moving 2nd-order cumulative sum of acceleration and gyroscope data | |
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91–93 | Moving 2nd-order cumulative sum of differences between cumulative sums of acceleration and gyroscope data | |
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94–96 | Polar coordinates of moving cumulative sum of acceleration data | , ,
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97–99 | Polar coordinates of moving cumulative sum of gyroscope data | , ,
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100–102 | Polar coordinates of moving cumulative sum of differences between acceleration and gyroscope data | , ,
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