deep-neighbors

Additional metrics

S_n, introduced in the paper

Rank-based overlap (RBO, implementation)

Spearman index

def calculate_idx(items_x, items_all):
	return [index(item, items_x) if item in items_x else len(items_x) for item in items_all]

items_all = items_a | items_b
idx_a = calculate_idx(items_a, items_all)
idx_b = calculate_idx(items_b, items_all)
similarity = spearman_correlation(idx_a, idx_b)