R/similarity_jaccard.R

In linkprediction: Link Prediction Methods

# Jaccard index
#
# Similarity measure counting the proportion of shared nodes.
#
# This is a simple wrapper to an \pkg{igraph} function
#   \code{\link[igraph]{similarity.jaccard}}, which calculates the proportion
#   of shared neighbors of two vertices.
#

similarity_jaccard <- function(graph, v1, v2, ...){
  score <- igraph::similarity.jaccard(graph)
  score[v1, v2]
}