R/line.graph.R

In HyperG: Hypergraphs in R

## HyperG R Package
## 
## Copyright (c) 2021 David J. Marchette <dmarchette@gmail.com>
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## 


line.graph <- function(h)
{
	if(is.igraph(h)) return(igraph::line_graph(h))
   M <- incidence_matrix(dual_hypergraph(h))
	A <- Matrix::t(M) %*% M
	diag(A) <- 0
	A[A>1] <- 1
	graph_from_adjacency_matrix(A,mode="undirected")
}