Table 2 Feature list
From: An information-aware visualization for privacy-preserving accelerometer data sharing
Category | Feature names for 3 directions | Feature description |
|---|---|---|
Time | Xaverage,Yaverage, Zaverage | The average of each segment |
Xvariance, Yvariance, Zvariance | The variance of each segment | |
Xstandarddev,Ystandarddev, Zstandarddev | The standard deviation of each segment | |
Xaverageabsdif,Yaverageabsdif, Zaverageabsdif | The average of the absolute deviations of each segment | |
Xnanmax, Ynanmax, Znanmax | The maximum values of each segment | |
Xnanmin, Ynanmin, Znanmin | The minimum values of each segment | |
Xmedian, Ymedian, Zmedian | The 50th percentile values of each segment | |
Xperseven, Yperseven, Zperseven | The 70th percentile values of each segment | |
Xpereight, Ypereight, Zpereight | The 80th percentile values of each segment | |
Xpernine, Ypernine, Zpernine | The 90th percentile values of each segment | |
Frequency | Xpeakamplitude, Ypeakamplitude, Zpeakamplitude, Xdomfre,Ydomfre, Zdomfre | The value of the waveform’s peak of each segment after Fourier Transform |
Xenergy, Yenergy, Znergy | The power of the signal of each segment after Fourier Transform |