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Table 1 Description of 78 features used in the behavioural classifications of triaxial accelerometer data

From: An evaluation of machine learning classifiers for next-generation, continuous-ethogram smart trackers

Feature Explanation
Mean Mean of measurement along each axis
Variance variance of measurement along each axis
Standard deviation Standard deviation of measurement along each axis
Coefficient of variance Coefficient of variance of measurement along each axis
Skewness Skewness of measurement along each axis
Kurtosis Kurtosis of measurement along each axis
Maximum Maximum value of measurement along each axis
Minimum Minimum value of measurement along each axis
Range Range of measurement along each axis
Euclidean norm Euclidean norm of measurement along each axis
Covariance Covariance of measurements between two axes
Correlation Pearson correlation of measurements between two axes
Mean difference Mean difference of measurements between two axes
Standard deviation of difference Standard deviation of measurements between two axes
Variance of static body acceleration variance of static body acceleration along each axis
Variance of dynamic body acceleration variance of dynamic body acceleration along each axis
Mean dynamic body acceleration Overall dynamic body acceleration along each axis
Maximum dynamic body acceleration Maximum value of dynamic body acceleration along each axis
Overall Dynamic Body Acceleration Overall Dynamic Body Acceleration
Pitch Pitch angle of the device
Roll Roll angle of the device
Mean difference of continuous points Mean difference between two continuous points along each axis
Variance of difference of continuous points variance of difference between two continous points along each axis
Main frequency Frequency at the main frequency along each axis
Amplitude of main frequency Maximum amplitude of fft along each axis
25% quartile 25% quartile of measurement along each axis
50% quartile 50% quartile of measurement along each axis
75% quartile 75% quartile of measurement along each axis
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