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Table 1 Calculation of the variance for the 23 channels and channel selections

From: Automated seizure diagnosis system based on feature extraction and channel selection using EEG signals

CHn VAR CHn VAR CHn VAR
CH1 1.44E + 05 CH9 7.23E + 04 CH17 7.22E + 04
CH2 2.14E + 05 CH10 4.09E + 04 CH18 6.64E + 04
CH3 9.76E + 04 CH11 2.97E + 04 CH19 9.76E + 04
CH4 8.92E + 04 CH12 4.10E + 04 CH20 7.76E + 04
CH5 1.37E + 05 CH13 8.32E + 04 CH21 1.56E + 05
CH6 1.51E + 05 CH14 4.79E + 04 CH22 2.02E + 04
CH7 4.16E + 04 CH15 8.25E + 04 CH23 8.25E + 04
CH8 7.67E + 04 CH16 3.62E + 04   
  1. Italic values indicate the three highest variance parameters are for channels 2, 6, and 21 that will be selected for next step