Table 2. Contents of eeg structure in -eeg.mat files.

eeg.data	60×N matrix containing the EEG data. The rows are the channels corresponding to the channel locations in the corresponding -captrack.bvht and the columns are the N sample points. (units: μV)
eeg.eogdata	4×N matrix containing the EOG data, where the rows correspond to the following channels (shown in Fig. 1): (1) horizontal left temple (EOG_HL), (2) horizontal right temple (EOG_HR), (3) vertical above (EOG_VA), and (4) vertical below (EOG_VB). (units: μV)
eeg.rejectedchannels	Vector containing indices of rejected channels (e.g., 1, 7, 32,..)
eeg.processdata	(60 – Number rejected channels)×N matrix containing the processed EEG data. The rows are the channels retained for analysis and the columns are the N sample points. (units: μV)
eeg.icasphere	(60 – Number rejected channels)×(60 – Number rejected channels) matrix containing ICA sphering matrix
eeg.icaweights	(60 – Number rejected channels)×(60 – Number rejected channels) matrix containing ICA weight matrix