Fig. 8

Classification performance for different number of channels. a Classification accuracy for the channels selected using SFS. b Comparison between electrode selection methods using data from single wrist positions and c using data from three wrist positions combined. “Wrist single” corresponds to the average classification accuracy obtained when training and testing the classifier using data from single wrist positions. “Wrist comb.” is the average classification accuracy when the classifier was trained and tested using data from the three wrist positions combined