Module similarity 

Node similarity based on neighborhood overlap.

Three standard measures:

• Jaccard: |N(u) ∩ N(v)| / |N(u) ∪ N(v)|
• Cosine (Salton): |N(u) ∩ N(v)| / sqrt(|N(u)| * |N(v)|)
• Overlap: |N(u) ∩ N(v)| / min(|N(u)|, |N(v)|)

Functions

cosine

Cosine (Salton) similarity between two nodes.

jaccard

Jaccard similarity between two nodes based on neighbor sets.

overlap

Overlap coefficient between two nodes.

top_k_similar_jaccard

Compute top-k most similar nodes to u by Jaccard similarity.