Struct Parameters 

#[non_exhaustive]
pub struct Parameters {
    pub mu: usize,
    pub weights: Vec<f64>,
    pub mu_eff: f64,
    pub c_sigma: f64,
    pub d_sigma: f64,
    pub c_c: f64,
    pub c_1: f64,
    pub c_mu: f64,
    pub chi_n: f64,
}

The strategy’s parameters for n variables and population λ: the tutorial’s Table 1 with the negative weights set to zero. Run::parameters gives a run’s; they serialize, but aren’t read back, as nothing takes them in.

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.

mu: usize

μ = ⌊λ/2⌋, the candidates that move the mean.

weights: Vec<f64>

wᵢ ∝ ln((λ + 1)/2) − ln i, i = 1 … μ, summing to 1.

mu_eff: f64

μ_eff = 1/Σwᵢ², the selection’s variance-effective size.

c_sigma: f64

c_σ = (μ_eff + 2)/(n + μ_eff + 5).

d_sigma: f64

d_σ = 1 + 2 max(0, √((μ_eff − 1)/(n + 1)) − 1) + c_σ.

c_c: f64

c_c = (4 + μ_eff/n)/(n + 4 + 2 μ_eff/n).

c_1: f64

c₁ = 2/((n + 1.3)² + μ_eff).

c_mu: f64

c_μ = min(1 − c₁, 2 (1/4 + μ_eff + 1/μ_eff − 2)/((n + 2)² + μ_eff)).

chi_n: f64

E‖N(0, I)‖ ≈ √n (1 − 1/(4n) + 1/(21n²)).

Trait Implementations

impl Clone for Parameters

fn clone(&self) -> Parameters

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Parameters

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

Formats the value using the given formatter.

impl PartialEq for Parameters

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Parameters

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Parameters