Create a hierarchical random graph from an igraph graph
hrg creates a HRG from an igraph graph. The igraph graph must be
a directed binary tree, with $n-1$ internal and $n$ leaf
prob argument contains the HRG probability labels
for each vertex; these are ignored for leaf vertices.
- The igraph graph to create the HRG from.
- A vector of probabilities, one for each vertex, in the order of vertex ids.
Other hierarchical random graph functions: