Turn a segment list into an edgelist suitable for constructing an ngraph

Turn a segment list into an edgelist suitable for constructing an ngraph

c_EdgeListFromSegList(L)

Arguments

L

a list containing integer vectors from as.seglist

Value

An integer matrix of N rows and 2 columns

Details

It is up to the caller to generate the seglist. Note that isolated points will be dropped since they have no edges.

Examples

if (FALSE) {
library(nat)
# make a neuron with multiple subtrees
n=prune_vertices(Cell07PNs[[1]], 48L)
# Must use flatten=T if including all subtrees
sl=as.seglist(n, all = TRUE, flatten = TRUE)
c_EdgeListFromSegList(sl)
}