Position-Based Feature Selection for Body Sensors regarding Daily Living Activity Recognition

Table 2

Derived features with symbols and implemented data.

Feature	Notation	Applied data
Mean
Standard deviation
Variance
Mean absolute deviation	MAD
Range
Skewness
Kurtosis
4th moment
5th moment
Root mean square	RMS
Sum of absolute values	SA
Signal magnitude area	SMA
Intensity of movement	IM
Dominant frequency
Amplitude
Mean trend
Windowed mean difference
Variance trend
Windowed variance difference
Standard deviation trend
Windowed standard deviation difference
Correlation
Average energy	AE