Function sample_sphere_volume 

pub fn sample_sphere_volume(
    dim: usize,
    n: usize,
    radius: f64,
    positive: bool,
    seed: u64,
) -> IgraphResult<Vec<Vec<f64>>>

Sample points uniformly from the volume of a sphere.

Generates n points uniformly distributed inside a dim-dimensional ball of the given radius, centered at the origin. Uses sphere-surface sampling followed by radial scaling U^(1/dim) where U ~ U(0,1).

If positive is true, all coordinates are mapped to their absolute values (restricting to the positive orthant).

Returns a Vec<Vec<f64>> where each inner Vec has dim elements.

Errors

Returns InvalidArgument if:

• dim < 2
• radius <= 0

Examples

use rust_igraph::sample_sphere_volume;

let points = sample_sphere_volume(2, 100, 1.0, false, 42).unwrap();
assert_eq!(points.len(), 100);
// All points inside the unit disk
for p in &points {
    let r2: f64 = p.iter().map(|&x| x * x).sum();
    assert!(r2 <= 1.0 + 1e-10);
}