EEG example 1. (a) Original time series with epilepsy caused by inflammation (epileptic seizure is marked in grey), (b) corresponding time series of ordinal patterns (T=1, L=7) as numbers in [0, 1], (c) relative frequencies of the six ordinal 3-patterns (cf. table 1) in a sliding window of 2 s with partitioning in the vertical direction (ordinal pattern distribution, T=1, L=3) and (d) permutation entropy (T=1, L=3) for a sliding window of 2 s.