Computing degree of similarity among a group of sets
metrics, similarity
Solution
Pairwise, you can compute the Jaccard distance of two sets. It's simply the distance between two sets, if they were vectors of booleans in a space where {1, 2, 3…} are all unit vectors.
Problem
Suppose there are 4 sets: s1={1,2,3,4}; s2={2,3,4}; s3={2,3,4,5}; s4={1,3,4,5}; Is there any standard metric to present the similarity degree of this group of 4 sets? Thank you for the suggestion of Jaccard method. However, it seems pairwise. How can I compute the similarity degree of the whole group of sets?