mark_degree: Marking nodes based on degree properties

In netrics: Many Ways to Measure and Classify Membership for Networks, Nodes, and Ties

Marking nodes based on degree properties

Description

These functions return logical vectors the length of the nodes in a network identifying which hold certain properties or positions in the network.

• node_is_isolate() marks nodes that are isolates, with neither incoming nor outgoing ties.

• node_is_pendant() marks nodes that are pendants, with exactly one incoming or outgoing tie.

• node_is_universal() identifies whether nodes are adjacent to all other nodes in the network.

Usage

node_is_isolate(.data)

node_is_pendant(.data)

node_is_universal(.data)

Arguments

.data

A network object of class mnet, igraph, tbl_graph, network, or similar. For more information on the standard coercion possible, see manynet::as_tidygraph().

Value

A node_mark logical vector the length of the nodes in the network, giving either TRUE or FALSE for each node depending on whether the condition is matched.

Universal/dominating node

A universal node is adjacent to all other nodes in the network. It is also sometimes called the dominating vertex because it represents a one-element dominating set. A network with a universal node is called a cone, and its universal node is called the apex of the cone. A classic example of a cone is a star graph, but friendship, wheel, and threshold graphs are also cones.

See Also

Other degree: measure_central_degree, measure_centralisation_degree, measure_centralities_degree

Other marks: mark_core, mark_diff, mark_dyads, mark_nodes, mark_select_node, mark_select_tie, mark_ties, mark_triangles

Other nodal: mark_core, mark_diff, mark_nodes, mark_select_node, measure_assort_node, measure_broker_node, measure_brokerage, measure_central_between, measure_central_close, measure_central_degree, measure_central_eigen, measure_closure_node, measure_core, measure_diffusion_node, measure_diverse_node, member_brokerage, member_cliques, member_community, member_community_hier, member_community_non, member_components, member_core, member_diffusion, member_equivalence, motif_brokerage_node, motif_exposure, motif_node, motif_path

Examples

node_is_isolate(ison_brandes)
node_is_universal(create_star(11))

netrics documentation built on July 24, 2026, 5:07 p.m.