Share of the moves that fall into each motion type, summing to 1. A slot pair in which neither voice moves is not a move and is left out entirely, so an accompaniment that mostly sits still can still report mostly contrary motion. All four are 0 when nothing moves.
The voices move in opposite directions.
One voice holds while the other moves.
Both rise or both fall, and the interval between them changes.
Both rise or both fall, keeping the same interval.
Share of the slots where the lead holds or rests on which the counter attacks: 1 when the counter fills every gap the lead leaves, 0 when it moves only where the lead does. It is 0 when the lead never holds or rests, since there was nothing to complement.
Distance between the two lines, in semitones, over the slots where both sound.
Mean distance; 0 when the two lines never sound together.
Closest approach; 0 when the two lines never sound together.
Slots at which the two lines sit in the opposite order to the one they keep overall. A unison is not a crossing.
Longest run of consecutive slots sounding a perfect consonance.
Slots at which both lines sound, the denominator of separation.
How two lines move against each other, and how far apart they sit.