Function random_ungraph 

pub fn random_ungraph(
    nodes: usize,
    nedges: usize,
) -> Result<HashSet<(usize, usize)>, EdgeNumberError>

Random undirected graph.

Create and return a random undirected graph with a given number of nodes and edges. Each undirected edge {i, j} is represented by a pair of directed edges (i, j) and (j, i).

Arguments

• nodes: number of nodes.
• nedges: number of edges.

Returns

• Err: if the required number of vertices is greater than the maximum possible.
• Ok: set HashSet<(usize, usize)> of edges with usize vertex indices.

Examples

use graphalgs::generate::random_ungraph;
use petgraph::{ Graph, Directed };

let graph: Graph::<(), (), Directed, usize> = Graph::from_edges(
    random_ungraph(4, 5).unwrap()
);