Skip to main content
. 2021 Jun 23;8(6):201971. doi: 10.1098/rsos.201971

Figure 1.

Figure 1.

(a) An OPN was computed for each channel separately. Each channel time series is embedded in a d-dimensional space, using a time-lag τ, as is done when constructing Taken’s embedding into the phase space. The result is a temporally ordered set of vectors of length d, vt. Each vector vt is then mapped to the permutation π, which sorts the coefficients of the vector in increasing order (b). This new vector nt = π(vt) will be represented by a permutation of the numbers 1,2,,d. We can consider these permutations as nodes in a directed network and connect with a directed edge two permutations that come from consecutive time points (c).