Set one or more edge attributes — edge_attr<- • igraph

Set one or more edge attributes

Usage

edge_attr(graph, name, index = E(graph)) <- value

Arguments

graph: The graph.
name: The name of the edge attribute to set. If missing, then value must be a named list, and its entries are set as edge attributes.
index: An optional edge sequence to set the attributes of a subset of edges.
value: The new value of the attribute(s) for all (or index) edges.

Value

The graph, with the edge attribute(s) added or set.

See also

Vertex, edge and graph attributes delete_edge_attr(), delete_graph_attr(), delete_vertex_attr(), edge_attr(), edge_attr_names(), graph_attr(), graph_attr<-(), graph_attr_names(), igraph-attribute-combination, igraph-dollar, igraph-vs-attributes, set_edge_attr(), set_graph_attr(), set_vertex_attr(), set_vertex_attrs(), vertex_attr(), vertex_attr<-(), vertex_attr_names()

Examples

g <- make_ring(10)
edge_attr(g) <- list(
  name = LETTERS[1:10],
  color = rep("green", gsize(g))
)
edge_attr(g, "label") <- E(g)$name
g
#> IGRAPH afb8ed1 U--- 10 10 -- Ring graph
#> + attr: name (g/c), mutual (g/l), circular (g/l), name (e/c), color
#> | (e/c), label (e/c)
#> + edges from afb8ed1:
#>  [1] 1-- 2 2-- 3 3-- 4 4-- 5 5-- 6 6-- 7 7-- 8 8-- 9 9--10 1--10
plot(g)