igraph (version 1.0.1)

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

# NOT RUN {
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)
# }