Jaccard similarity

https://en.wikipedia.org/wiki/Jaccard_index

https://www.sciencedirect.com/science/article/pii/S0378873321000630

From the co-appearance matrix/network Co:

J[u,v] = Co[u,v]/(Co[u,u]+Co[v,v]-Co[u,v])

select/read projection network Co
Network/Create Vector/Get loops = D
Network/Create new network/Transform/Line values/Set to 1 = B
Operations/Network+Vector/Vector#Network/Output = S1
select B
Operations/Network+Vector/Vector#Network/Input = S2
select B
File/Network/Dispose
File/Vector/Dispose
select S1 as First
select S2 as Second
Networks/Cross-intersection/Add = S3
select S1
File/Network/Dispose
select S2
File/Network/Dispose
select S3 as First
select Co as Second
Networks/Cross-intersection/Subtract = S4
select S3
File/Network/Dispose
select Co as First
select S4 as Second
Networks/Cross-intersection/Divide = J
File/Network/Change label [Jaccard]
select S4
File/Network/Dispose