(a)
(b)
(c)
(d)
Figure 2:
Comparison of mean frequency estimation for seizure-free and seizure intervals for different intrinsic mode functions (IMFs): IMF1
(
𝑝
=
0
)
, IMF2
(
𝑝
=
0
)
, IMF3
(
𝑝
=
0
)
, and IMF4
(
𝑝
=
2
.
6
9
2
1
×
1
0
−
1
2
)
.