pyeeg.connectivity.csd_ndarray

pyeeg.connectivity.csd_ndarray(x, fs=1, nfft=None)

Compute the cross-spectral density between each column of x.

Parameters:

• x (ndarray (nsamples, nchannels)) – Input data. The cross-spectral density is computed for every pair of channels with scipy.signal.csd().

• fs (float) – Sampling frequency of the signal (in Hz). Default is 1.

• nfft (int, optional) – Length of the FFT. If None, nfft = nsamples.

Returns:

S – Cross-spectral density tensor, where nfreqs = nfft // 2 + 1. S[i, j, :] is the cross-spectrum between channels i and j.

Return type:

ndarray (nchannels, nchannels, nfreqs)