Struct RouletteSelection 

pub struct RouletteSelection { /* private fields */ }

Roulette wheel selection (fitness proportionate)

Selection probability is proportional to fitness.

Implementations

impl RouletteSelection

pub fn new() -> Self

Create a new roulette selection

pub fn with_offset(offset: f64) -> Self

Create with a fitness offset (to handle negative fitness)

Trait Implementations

impl Clone for RouletteSelection

fn clone(&self) -> RouletteSelection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RouletteSelection

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

Formats the value using the given formatter.

impl Default for RouletteSelection

fn default() -> Self

Returns the “default value” for a type.

impl<G: EvolutionaryGenome> SelectionOperator<G> for RouletteSelection

fn select<R: Rng>(&self, population: &[(G, f64)], rng: &mut R) -> usize

Select a single individual from the population

fn select_many<R: Rng>( &self, population: &[(G, f64)], count: usize, rng: &mut R, ) -> Vec<usize>

Select multiple individuals from the population