cogpy.wave.phase_gradient

Phase-gradient analysis and plane-wave fitting.

Implements the phase-gradient directionality (PGD) framework from Zhang et al. (2018) for characterizing travelling waves via spatial gradients of instantaneous phase.

References

[1]

Zhang et al., “Theta and Alpha Oscillations Are Traveling Waves in the Human Neocortex”, Neuron, 2018. DOI: 10.1016/j.neuron.2018.05.019

Ported from sayak66/wm_travelingwaves_code (phase gradient, PGD, plane-wave fit).

Functions

hilbert_phase(data[, axis])	Compute unwrapped instantaneous phase via the Hilbert transform.
pgd(phase, geometry)	Phase-gradient directionality score per time step.
phase_gradient(phase, geometry)	Compute the spatial phase gradient at each time step.
plane_wave_fit(phase, geometry[, freq])	Fit a plane wave to each time frame of a phase map.