Function transitivity_gap 

pub fn transitivity_gap(graph: &Graph) -> IgraphResult<f64>

Compute the transitivity gap.

global_transitivity - avg_local_transitivity — the difference between the global clustering coefficient (fraction of closed triplets) and the mean local clustering coefficient. Can be positive or negative. Returns 0.0 for graphs with no triplets.

Examples

use rust_igraph::{Graph, transitivity_gap};

// K_4: global=1.0, all local=1.0 → gap=0.0
let g = Graph::from_edges(
    &[(0,1),(0,2),(0,3),(1,2),(1,3),(2,3)], false, Some(4)
).unwrap();
assert!(transitivity_gap(&g).unwrap().abs() < 1e-10);