Enum RadialInputKernel 

pub enum RadialInputKernel {
    Matern {
        length_scale: f64,
        nu: MaternNu,
    },
    DuchonHybrid {
        length_scale: f64,
        p_order: usize,
        s_order: usize,
        dim: usize,
    },
    DuchonPure {
        block_order: usize,
        p_order: usize,
        s_order: usize,
        dim: usize,
    },
    ThinPlate {
        length_scale: f64,
        dim: usize,
    },
}

Closed-form parameterisation of the radial families supported by the input-location derivative routines below.

This is a thin convenience over [RadialScalarKind] (which itself is a crate-internal enum carrying the same parameters). The public layer here is kept as a separate type so that downstream consumers — including the Python pyffi layer that will surface LatentCoord — can construct kernel descriptors without poking at pub(crate) items.

Variants

Matern

Matérn isotropic kernel with closed-form (½, 3⁄2, 5⁄2, 7⁄2, 9⁄2)-ν.

Fields

length_scale: f64

nu: MaternNu

DuchonHybrid

Hybrid Duchon kernel ||w||^(2p) · (κ² + ||w||²)^s.

Fields

length_scale: f64

p_order: usize

s_order: usize

dim: usize

DuchonPure

Pure scale-free Duchon kernel (single polyharmonic block of the given order). Equivalent to DuchonHybrid with s_order = 0 and no finite length scale.

Fields

block_order: usize

p_order: usize

s_order: usize

dim: usize

ThinPlate

Thin-plate spline kernel with explicit length-scale (used by the 1-D thin-plate streaming path; for the general d-D thin-plate this coincides with the polyharmonic Duchon kernel of order m_d).

Fields

length_scale: f64

dim: usize

Implementations

impl RadialInputKernel

pub const fn dim(&self) -> usize

Ambient input dimension d (the kernel argument length).

Trait Implementations

impl Clone for RadialInputKernel

fn clone(&self) -> RadialInputKernel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RadialInputKernel

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

Formats the value using the given formatter.