WOLFRAM

Wolfram Language & System Documentation Center

EdgeTags[g]

gives the list of tags for all edges in the graph g.

EdgeTags[g,{u,v}]

gives the list of tags for edges between u and v.

Details
Details and Options Details and Options
Examples  
Basic Examples  
Scope  
Properties & Relations  
Possible Issues  
See Also
Related Guides
History
Cite this Page

EdgeTags

EdgeTags[g]

gives the list of tags for all edges in the graph g.

EdgeTags[g,{u,v}]

gives the list of tags for edges between u and v.

Details

  • EdgeTags[g] returns the list of edge tags in the order used by the graph g.
  • For a directed graph g, EdgeTags[g,{u,v}] gives tags for edges from u to v.
  • Null is used to indicate the absence of a tag in an edge.
  • When a graph g has no edge with tags, EdgeTags[g] gives an empty list.

Examples

open all close all

Basic Examples  (1)

The list of edge tags for an explicitly constructed graph:

The list of edge tags between 1 and 2:

Scope  (5)

EdgeTags works with undirected graphs:

Directed graphs:

Multigraphs:

Mixed graphs:

EdgeTags works with large graphs:

Properties & Relations  (4)

EdgeCount can be found using EdgeTags in a tagged graph:

Tags in EdgeTags are given in the same order their edges are entered for Graph:

EdgeTags gives an empty list for input that is not tagged graphs:

EdgeTags can be found using EdgeList in IndexEdgeTaggedGraph:

Possible Issues  (2)

Null is used to indicate the absence of a tag in an edge:

EdgeTags gives an empty list for a graph with no edge tags:

Wolfram Research (2020), EdgeTags, Wolfram Language function, https://reference.wolfram.com/language/ref/EdgeTags.html.

Text

Wolfram Research (2020), EdgeTags, Wolfram Language function, https://reference.wolfram.com/language/ref/EdgeTags.html.

CMS

Wolfram Language. 2020. "EdgeTags." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/EdgeTags.html.

APA

Wolfram Language. (2020). EdgeTags. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/EdgeTags.html

BibTeX

@misc{reference.wolfram_2025_edgetags, author="Wolfram Research", title="{EdgeTags}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/EdgeTags.html}", note=[Accessed: 11-August-2025]}

BibLaTeX

@online{reference.wolfram_2025_edgetags, organization={Wolfram Research}, title={EdgeTags}, year={2020}, url={https://reference.wolfram.com/language/ref/EdgeTags.html}, note=[Accessed: 11-August-2025]}