Function check_chebyshev_lagrange

examples/clippy_verify.rs:74–95

()

}

fn check_chebyshev_lagrange() {
    // chebyshev_nodes carries one of the affected loops directly.
    for &n in &[4_usize, 8, 16, 32] {
        let nodes = chebyshev_nodes(n, -2.0, 3.5);
        print_kv(&format!("chebyshev_nodes(n={n}) hash"), hash_f64s(&nodes));
    }
    // lagrange_polynomial uses divided-difference loops touched by clippy.
    let xs = vec![0.0_f64, 0.5, 1.1, 1.7, 2.4, 3.0];
    let ys: Vec<f64> = xs.iter().map(|x| x.sin() + 0.5 * x).collect();
    let p = lagrange_polynomial(xs.clone(), ys.clone());
    for &q in &[0.1_f64, 0.7, 1.3, 1.9, 2.5] {
        print_kv(
            &format!("lagrange.eval({q})"),
            format!("{:.17e}", p.eval(q)),
        );
    }
    print_kv(
        "lagrange.derivative coeffs",
        hash_f64s(&p.derivative().coef),
    );
    print_kv("lagrange.integral coeffs", hash_f64s(&p.integral().coef));
}

fn check_lanczos() {
    for &z in &[0.5_f64, 1.0, 1.5, 2.5, 3.7, 5.5, 10.25, 100.0] {