vertex

Helper function for adding and deleting vertices

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

Usage

vertex(...)
vertices(...)

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.

See Also

Other functions for manipulating graph structure: +.igraph, add_edges, add_vertices, delete_edges, delete_vertices, edge, igraph-minus, path

Aliases

• vertex
• vertices

Examples

# NOT RUN {
g <- make_(ring(10), with_vertex_(name = LETTERS[1:10])) +
  vertices('X', 'Y')
g
plot(g)
# }