. Author manuscript; available in PMC: 2021 Jul 1.

Published in final edited form as: Proc ACM Interact Mob Wearable Ubiquitous Technol. 2020 Jun;4(2):72. doi: 10.1145/3397313

Table 2.

List of features extracted for classification

Category	Features
Statistics	Max, min, mean, median, std. dev., RMS, correlation, skewness, kurtosis, 1st & 3^rd quartile, interquartile range
Frequency	Frequency amplitude of 0.25 Hz, 0.5 Hz, 0.75 Hz, 1 Hz, 1.25 Hz, 1.5 Hz, 1.75 Hz, 2 Hz, 2.25 Hz, 2.5 Hz
Statistics of frequency	Skewness and kurtosis of spectrum from frequency features
Time-series	Count below/above mean, first location of min/max, longest strike below/above mean, number of peaks
Periodic subsequence	p_min, p_max, ϵ, length
Time	Hour of day