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Accuracy of different feature sets produced by support vector machine in wrapper method. Highest accuracy is mark in red circle: (a) Accelerometer X-axial feature set; (b) accelerometer Y-axial feature set; (c) accelerometer Z-axial feature set; (d) gyroscope X-axial feature set; (e) gyroscope Y-axial feature set; (f) gyroscope Z-axial feature set.
