Struct DbscanConfig 

#[non_exhaustive]
pub struct DbscanConfig {
    pub eps: f64,
    pub min_points: usize,
}

Configuration for DBSCAN density clustering over functional data.

DBSCAN discovers clusters of arbitrary shape by expanding dense regions of curves in functional L2 distance space. Curves that do not belong to any dense region are flagged as noise (None in DbscanResult::cluster).

Distance units

eps is in the same units as l2_distance_matrix — that is, functional L2 distance with Simpson’s-rule integration weights. For a constant-1 curve on argvals spanning [0, 1], the L2 norm is ≈ 1.0. As a practical starting point, set eps to a fraction (e.g. 0.1–0.5) of the dataset’s median pairwise L2 distance:

let dist = l2_distance_matrix(&data, &argvals);
let n = data.nrows();
let mut upper: Vec<f64> = Vec::new();
for i in 0..n {
    for j in (i + 1)..n {
        upper.push(dist[(i, j)]);
    }
}
upper.sort_by(|a, b| a.partial_cmp(b).unwrap());
let median_dist = upper[upper.len() / 2];
let eps = 0.3 * median_dist; // start here, tune as needed
let _ = eps;

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

eps: f64

Neighbourhood radius in functional L2 distance units (default: 0.5).

Must be strictly positive (eps > 0). A tiny positive value makes every curve a noise point; a very large value merges everything into one cluster.

min_points: usize

Minimum number of curves (including the point itself) required in the eps-neighbourhood for a point to be considered a core point (default: 3).

Must be ≥ 1.

Trait Implementations

impl Clone for DbscanConfig

fn clone(&self) -> DbscanConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DbscanConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DbscanConfig

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for DbscanConfig

fn eq(&self, other: &DbscanConfig) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for DbscanConfig