cogpy.measures.comparison

Before/after signal comparison metrics.

Pure functions for quantifying the effect of a signal processing step (e.g., artifact removal) by comparing signals or their spectra.

Functions

bandpower_change(psd_before, psd_after, ...)	Fractional change in band power: (P_after - P_before) / P_before.
residual_energy_ratio(original, cleaned, *)	Ratio of residual energy to original energy.
snr_improvement(psd_before, psd_after, ...)	Change in signal-to-noise ratio after processing.
waveform_residual_rms(template_before, ...)	RMS of the difference between two waveforms (e.g. triggered averages).