(a)
Set A, at level 10
(b)
Set E, at level 10
(c)
Set A, at level 9
(d)
Set E, at level 9
(e)
Set A, at level 8
(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.