Struct EsState 

pub struct EsState<B: Backend> { /* private fields */ }

Generation state for EvolutionStrategy.

Implementations

impl<B: Backend> EsState<B>

pub fn try_new( parents: Tensor<B, 2>, sigmas: Tensor<B, 1>, parent_fitness: Vec<f32>, best_genome: Option<Tensor<B, 2>>, best_fitness: f32, generation: usize, successes_in_window: u32, window_len: u32, ) -> Result<Self, ConfigError>

Assembles an ES state, checking the parent fitness cache matches the parent count.

Errors

Returns a ConfigError if parents has zero rows or if parent_fitness is non-empty with a length other than the parent count μ (parents.dims()[0]). The bootstrap state (empty parent_fitness) is accepted.

pub fn parents(&self) -> &Tensor<B, 2>

Parent population, shape (μ, D) (or (1, D) for (1+1)/(1+λ)).

pub fn sigmas(&self) -> &Tensor<B, 1>

Per-parent σ values (see the field docs for the transient (μ + λ,) shape held between ask and tell).

pub fn parent_fitness(&self) -> &[f32]

Parent fitnesses (empty at bootstrap, else μ long).

pub fn best_genome(&self) -> Option<&Tensor<B, 2>>

Best-so-far genome (shape (1, D)), or None before the first tell.

pub fn best_fitness(&self) -> f32

Best-so-far (canonical, maximise) fitness.

pub fn generation(&self) -> usize

Completed-generation counter.

pub fn successes_in_window(&self) -> u32

(1+1) only: running success count for the 1/5th rule.

pub fn window_len(&self) -> u32

(1+1) only: window length observed so far.

Trait Implementations

impl<B: Clone + Backend> Clone for EsState<B>

fn clone(&self) -> EsState<B>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<B: Debug + Backend> Debug for EsState<B>

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

Formats the value using the given formatter.