An igraph graph is named, if there is a symbolic name
associated with its vertices.
Usage
is.named(graph)
Arguments
graph
The input graph.
Value
A logical scalar.
concept
Named graphs
Details
In igraph vertices can always be identified and specified via their
numeric vertex ids. This is, however, not always convenient, and in
many cases there exist symbolic ids that correspond to the
vertices. To allow this more flexible identification of vertices, one
can assign a vertex attribute called name to an igraph
graph. After doing this, the symbolic vertex names can be used in all
igraph functions, instead of the numeric ids.
Note that the uniqueness of vertex names are currently not enforced in
igraph, you have to check that for yourself, when assigning the vertex
names.