chickadee » graphs » graph-vertex-add!

(graph-vertex-add (G <graph>) vertex [#!rest attr])method
(graph-vertex-add! (G <graph>) vertex [#!rest attr])method

Adds a vertex with attributes attr to a graph G. Raises an error if the vertex already exists within the graph.

G
the graph you wish to add a vertex to
vertex
the vertex (identifier) you wish to add
attr
a series of keyword / value pairs that define vertex attributes