MATLAB can relabel graph node table columns but not edge table columns.

It seems that I can rename a column in the Nodes table of a graph but trying to do so for the Edges table returns an error. (This is a minimal example. It has come up in a method I'm trying to write for a user-defined class.)

g=digraph([1 2],[2 2]);
g.Nodes.label={'A';'B'}

g = 
  digraph with properties:

    Edges: [2×1 table]
    Nodes: [2×1 table]

g.Nodes = renamevars(g.Nodes,'label','Label')

g = 
  digraph with properties:

    Edges: [2×1 table]
    Nodes: [2×1 table]

g.Edges.label={'A';'B'}

g = 
  digraph with properties:

    Edges: [2×2 table]
    Nodes: [2×1 table]

g.Edges = renamevars(g.Edges,'label','Label')

Error using digraph/subsasgn>assignToEdges
Direct editing of edges not supported. Use addedge or rmedge instead.

Error in indexing (line 14)
G = assignToEdges(G, S, V);

Answer 1

[Jinal]

Hi Roy,

I understand that you are facing issues while using ‘renamevars’ to rename a column in 'g.Edges'.

You can use the following command to rename the column.

g.Edges.Properties.VariableNames("label") = "Label";

Please refer this page for more information.

Hope this helps.