Enum OptimalityKind 

pub enum OptimalityKind {
    A,
    D,
}

Optimality kind for the DesignCriterion::Score criterion.

Variants

A

A-optimality: trace of the posterior score covariance Cov(ξ | Y_S). Empty design returns Σ_k λ_k.

D

D-optimality: log-determinant of the posterior score covariance, Σ_k log(posterior eigenvalues), returned un-negated. Adding design points shrinks the posterior covariance, so this value is monotone NON-INCREASING: log det Cov(ξ | Y_S) ≤ log det Λ = Σ_k log λ_k. Its SIGN is not fixed — it depends on the eigenvalue scale (e.g. λ = [2, 1] gives an empty-design value of ln 2 ≈ +0.693, positive). Do NOT assume it is negative, and do NOT negate it. Empty design returns Σ_k log λ_k.

Trait Implementations

impl Clone for OptimalityKind

fn clone(&self) -> OptimalityKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptimalityKind

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

Formats the value using the given formatter.

impl PartialEq for OptimalityKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OptimalityKind