197352.fig.004a
(a) Set A, at level 10
197352.fig.004b
(b) Set E, at level 10
197352.fig.004c
(c) Set A, at level 9
197352.fig.004d
(d) Set E, at level 9
197352.fig.004e
(e) Set A, at level 8
197352.fig.004f
(f) Set E, at level 8
Figure 4: The plots of coefficients of wavelet approximation of sample EEG signals at various wavelet decomposition level, that is, 10, 9, and 8.