Labelling the edges in a graph with python igraph

Question

I have the adjacency matrix (i.e. a collection of weights) of a directed graph, and I would like to add labels (corresponding to the values of the weights) on the edges in the final plot. In other words, I would like to obtain something like this. I'm using python igraph, and my code is as follows: ``` import numpy as np import igraph as ig N = 6 adj_matr = np.random.random((N, N)) g = ig.Graph.Weighted_Adjacency(adj_matr.tolist(), mode=ig.ADJ_DIRECTED, attr="weight", loops=True) ig.plot(g, "My_Graph.svg", vertex_label=map(str, np.arange(N))) ``` I have figured out how to set labels on the nodes, but I cannot find anything concrete about the edges (adding `edge_label=...` in the plot command doesn't work). Do you know how to fix the problem? Thanks in advance for your help!

Accepted Answer

using `vertex_label=` is equivalent to `g.vs=`

so to label your edges, use `g.es=`:

```
g.es["label"] = ["A", "B", "C"]
```

or

```
g.es["name"] = map(str, np.arange(N))
```

Labelling the edges in a graph with python igraph

Solution

Problem