vertex: Helper function for adding and deleting vertices

In igraph: Network Analysis and Visualization

Helper function for adding and deleting vertices

Description

This is a helper function that simplifies adding and deleting vertices to/from graphs.

Usage

vertex(...)

vertices(...)

Arguments

...	See details below.

Details

vertices() is an alias for vertex().

When adding vertices via +, all unnamed arguments are interpreted as vertex names of the new vertices. Named arguments are interpreted as vertex attributes for the new vertices.

When deleting vertices via -, all arguments of vertex() (or vertices()) are concatenated via c() and passed to delete_vertices().

Value

A special object that can be used with together with igraph graphs and the plus and minus operators.

See Also

Other functions for manipulating graph structure: +.igraph(), add_edges(), add_vertices(), complementer(), compose(), connect(), contract(), delete_edges(), delete_vertices(), difference(), difference.igraph(), disjoint_union(), edge(), igraph-minus, intersection(), intersection.igraph(), path(), permute(), rep.igraph(), reverse_edges(), simplify(), union(), union.igraph()

Examples

g <- make_(ring(10), with_vertex_(name = LETTERS[1:10])) +
  vertices("X", "Y")
g
plot(g)

igraph documentation built on Oct. 20, 2024, 1:06 a.m.