Sensor Type, Axis, and Position-Based Fusion and Feature Selection for Multimodal Human Daily Activity Recognition in Wearable Body Sensor Networks

Table 11

Comparison between single axis vs triple axes for accelerometer, gyroscope, and electromyography signals before using feature selection.

Sensor type and position	DT	SVM	RF	k-NN	No. of features
A_lt_x	88.10	89.40	90.70	79.10	14
G_lt_y	85.80	83.90	86.80	66.90	14
EMG	76.90	78.90	79.20	66.20	14
A_lt_x + G_lt_y	90.00	89.40	94.70	71.50	28
A_lt_x + G_lt_y + EMG	91.40	90.70	95.20	72.80	42
A_lt_all	92.03	93.60	95.00	83.90	56
G_lt_all	87.90	88.60	92.50	81.20	56
A, G_lt_all	95.10	95.40	96.80	84.80	112
A, G_lt_all + EMG	96.80	96.70	98.50	87.30	126