How to find all the edges connecting a specific node with other nodes?

Hi,

Let G be an undirected graph of 1000 nodes. How can I find all the edges of a specific node?

I cannot pass the node's ID as an input argument to the built-in function "findedge", so I would appreciate your help and ideas.

Thanks

Answer 1

[Christine Tobler]

Use outedges to find the IDs of all outgoing edges, or neighbors to find all nodes connected to by these edges.

[Rayan Glus]

Thank you so much.

Answer 2

[Steven Lord]

Let's take a sample undirected graph.

G = graph(bucky);

What nodes are connected to node 51?

N = neighbors(G, 51)

N = 3×1

49 52 55

Let's plot the graph then highlight node 51 and its neighbors in the plot with large red stars instead of the small blue circles of the rest of the nodes.

h = plot(G);
highlight(h, [51; N], 'MarkerSize', 12, 'NodeColor', 'r', 'Marker', '*')

We can see that each of nodes 49, 52, and 55 are indeed connected to node 51.

[Rayan Glus]

Thank you so much for the great explanation.

Now, I can pass (s = 51) and its neighbors as t to built-in findedge.

Much appreciated.