mne_denoise.qa.variance_removed

mne_denoise.qa.variance_removed(data_before: ndarray, data_after: ndarray) → float

Compute percentage of total variance removed.

The definition is 100 * (1 - var(data_after) / var(data_before)).

Parameters:

data_before, data_afterndarray

Data before and after cleaning with matching shapes.

Returns:

float

Percentage removed. Positive values indicate reduced variance, negative values increased variance, and zero input variance returns 0.0.