Fig. 4
From: Improving the recognition of grips and movements of the hand using myoelectric signals
Assigning symbols to the five sensor streams using an alphabet size of five. Graphs for four of the eight signal channels are shown for a 3.5 to 8 s segment, corresponding to the end of the neutral/rest (NR) activity and the entire hammer grip (HG), for the average of all sensor values for the training runs. The SAX window size is 100 ms. The horizontal lines show the cut-off boundaries for the five symbol alphabet, A through E. The selected graphs show the diversity of cut-off values that vary for each of the eight sensors