Table 1. Similarity metrics assumptions on the neural code.

	R	NDP	SF	SPIKE
Binned (spike count code)	X	X	X
Binless (spike time code)				X
Preserved time relationship between time points or bins				X
"raw" (not baseline-subtracted) spike count vectors		X	X
Assumption of linear relationship between spike trains	X	X	X
Assumption of Euclidean space	X	X	X
Excludes common periods of silence		X
Mostly sensitive to binwise synchrony	X	X
Sensitive to spike time synchrony				X
Sensitive to differences in firing rate or burstiness between spike trains			X	X