Extract the phi-coefficient observed between the two time-series on a specific state k.
Phi-coefficient is the recurrence observed between the two time-series on a specific state k. The phi(k) coefficient increases with the frequency of matching recurrence on the same state (k ; k) and away from this state (not k ; not k) between the two time-series. On the other hand, phi(k) decreases with the frequency of mismatching objects (k; not-k, and vice versa).
calcphi(t1, t2, ws, k)
Number of delays (+/-) considered
The categorical state on which phi is calculated
It returns the recurrence phi-coefficient profile for state k for all delays considered
Moreno I. Coco (email@example.com)
Dale, R., Warlaumont, A. S. and Richardson, D. C. (2011). Nominal cross recurrence as a generalized lag sequential analysis for behavioral streams. International Journal of Bifurcation and Chaos, 21, 1153-1161. (special issue on recurrence)
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