Enum Kernel 

pub enum Kernel {
    Gauss {
        centers: Vec<Vec<Number>>,
        amps: Vec<Number>,
        inv_sigma2: Vec<Number>,
    },
    Pole {
        centers: Vec<Vec<Number>>,
        eta: Number,
        q: Number,
        soft: Number,
        inv_len2: Vec<Number>,
    },
}

A repulsion kernel evaluated at the current iterate. Centers are the found minima; the per-dimension scales make the bumps/poles anisotropic.

Variants

Gauss

Σ Aₖ·exp(−½‖(x−cₖ)/σ‖²) — flooding’s Gaussian bumps. amps is one height per center; inv_sigma2 is the per-dimension 1/σ².

Fields

centers: Vec<Vec<Number>>

amps: Vec<Number>

inv_sigma2: Vec<Number>

Pole

Σ η·(‖(x−cₖ)/ℓ‖²+soft)^(−q) — deflation/tunneling’s softened poles. q = power/2; inv_len2 is the per-dimension 1/ℓ².

Fields

centers: Vec<Vec<Number>>

eta: Number

q: Number

soft: Number

inv_len2: Vec<Number>

Implementations

impl Kernel

pub fn value(&self, x: &[Number]) -> Number

Penalty value at x.

pub fn add_grad(&self, x: &[Number], grad: &mut [Number])

Add the penalty gradient at x into grad (in place).

Trait Implementations

impl Clone for Kernel

fn clone(&self) -> Kernel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Kernel

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

Formats the value using the given formatter.