Union of graphs

graph.union() was renamed to union.igraph() to create a more consistent API.

Usage

graph.union(..., byname = "auto")

Arguments

...

Graph objects or lists of graph objects.

byname

A Logical, or the character scalar auto. Whether to perform the operation based on symbolic vertex names. If it is auto, that means TRUE if all graphs are named and FALSE otherwise. A warning is generated if auto and some (but not all) graphs are named.

Related documentation in the C library

vcount(), permute_vertices(), edges(), get_eids(), ecount()