Quick access to edge list columns

If only one of the two columns in the edge list is needed, these functions provide a more efficient way to access them.

Usage

igraph_from(graph)

igraph_to(graph)

Source

https://github.com/igraph/igraph/blob/master/include/igraph_datatype.h

Arguments

graph

An igraph_ptr object.

Value

igraph_from() returns the head vertices of all the edges.

igraph_to() returns the tail vertices of all the edges.

See also

as.matrix.igraph_ptr() and as.data.frame.igraph_ptr() to get entire edge lists.

Examples

g = graph_create(seq_len(6L))
igraph_from(g)
#> [1] 1 3 5
igraph_to(g)
#> [1] 2 4 6