I am new to graph theory, I am working with DAGs.
I came across this code, that when working with 3 nodes it did:
dag2=dag2+(dag %^% 2)
When it had 4 nodes:
for(i in 2:3)
dag2=dag2+(dag %^% i)
I do understand the code, but I don't know what this means graphically. My question is, what is this doing graphically: what means to square or cube the matrix representation of a graph?