mne_denoise.qa.channel_variance_ratio

mne_denoise.qa.channel_variance_ratio(data_before: ndarray, data_after: ndarray) → ndarray

Compute after/before variance for each channel.

Parameters:

data_beforendarray, shape (n_channels, n_times) or (n_epochs, n_channels, n_times)

Data before cleaning.

data_afterndarray

Data after cleaning with the same shape.

Returns:

ndarray, shape (n_channels,)

Variance ratio pooled over time, or epochs and time. Zero denominators are replaced with machine epsilon.