How to use the names from original graph on quotient graph?-CodePudding

I have a graph g1 and I need to find the

Question. Is it possible to solve the task without using the additional attribute V(g1)$label?

CodePudding user response：

You should use $name (instead of $names) to add vertex name attribute, e.g.,

g1 <- graph_from_adjacency_matrix(m, weighted = TRUE, mode = "directed")
V(g1)$name <- letters[1:n]

g2 <- contract(g1, components(g1, mode = "strong")$membership, vertex.attr.comb = toString)
g2 <- simplify(g2)

then, when you run plot(g2), you will see