igraph (version 1.0.0)

vertex_attr: Query vertex attributes of a graph

Description

Query vertex attributes of a graph

Usage

vertex_attr(graph, name, index = V(graph))

Arguments

graph

The graph.

name

Name of the attribute to query. If missing, then all vertex attributes are returned in a list.

index

A vertex sequence, to query the attribute only for these vertices.

Value

• The value of the vertex attribute, or the list of all vertex attributes, if name is missing.

See Also

Other graph attributes: $.igraph.vs, $<-.igraph.vs, V<-, [<-.igraph.vs, [[<-.igraph.vs, igraph-vs-attributes, igraph-vs-attributes, igraph-vs-attributes, igraph-vs-attributes, igraph-vs-attributes; $.igraph, $<-.igraph, igraph-dollar, igraph-dollar; attributes, graph_attr_names, list.graph.attributes; delete_edge_attr, remove.edge.attribute; delete_graph_attr, remove.graph.attribute; delete_vertex_attr, remove.vertex.attribute; edge.attributes<-, edge_attr<-; edge.attributes, edge_attr, get.edge.attribute; edge_attr_names, list.edge.attributes; get.graph.attribute, graph.attributes, graph_attr; graph.attributes<-, graph_attr<-; list.vertex.attributes, vertex_attr_names; set.edge.attribute, set_edge_attr; set.graph.attribute, set_graph_attr; set.vertex.attribute, set_vertex_attr; vertex.attributes<-, vertex_attr<-

Examples

g <- make_ring(10) %>%
  set_vertex_attr("color", value = "red") %>%
  set_vertex_attr("label", value = letters[1:10])
vertex_attr(g, "label")
vertex_attr(g)
plot(g)