How to add vertex/edge labels to existing graph

Question

If I have already created a graph using Graph. Later, I want to add to the graph some vertex and/or edge labels, how can I do that?

Thank you.

Vitaliy Kaurov · Answer 1 · 2012-02-21 21:04:35Z

up vote 6 down vote

A random graph without any labeling:

g = RandomGraph[{11, 21}]

enter image description here

You can use SetProperty to add labeling P.S.

SetProperty[g, {EdgeLabels -> {3 \[UndirectedEdge] 4 -> "COOL"}, 
  VertexLabels -> {1 -> "STUFF"}}]

enter image description here

answered Feb 21 '12 at 21:04

Vitaliy Kaurov
28.1k354123

1

actually in version 8.0.0.0, it is not working

SetProperty[g, {EdgeLabels -> {3 \[UndirectedEdge] 4 -> "COOL"}, 
  VertexLabels -> {1 -> "STUFF"}}]

. Looks like SetProperty can only set one property at a time. – Qiang Li Feb 21 '12 at 22:26

1 Answer