Table 1.

The ranking and definitions of the top 20 most important features in kinematics classification and the mean normalized importance values over 1000 random dataset partitions.

Ranking	Meaning	Mean normalized importance
1	|ω|: median spectral density in (0, 50 Hz)	0.094
2	ωy: median spectral density in (0, 50 Hz)	0.062
3	|ω|: mean spectral density in (0, 50 Hz)	0.056
4	|a|: median spectral density in (0, 50 Hz)	0.036
5	ωy: mean spectral density in (0, 50 Hz)	0.031
6	az: max spectral density in (150, 200 Hz)	0.023
7	az: max spectral density in (100, 150 Hz)	0.022
8	|a|: mean spectral density in (0, 50 Hz)	0.021
9	ay: max spectral density in (150, 200 Hz)	0.020
10	az: mean spectral density in (150, 200 Hz)	0.019
11	|ω|: max spectral density in (0, 50 Hz)	0.019
12	|ω|: median spectral density in (150, 200 Hz)	0.019
13	|ω|: median spectral density in (50, 100 Hz)	0.019
14	|ω|: mean spectral density in (50, 100 Hz)	0.017
15	ax: mean spectral density in (0, 50 Hz)	0.016
16	az: max spectral density in (150, 200 Hz)	0.016
17	|ω|: max spectral density in (50, 100 Hz)	0.015
18	az: mean spectral density in (100, 150 Hz)	0.015
19	az: max spectral density in (100, 150 Hz)	0.015
20	ax: median spectral density in (0, 50 Hz)	0.015