Struct EvolutionBuilder 

pub struct EvolutionBuilder<T: Individual> { /* private fields */ }

This is the helper struct to create a new Evolution object. The fitness, selection, crossover, mutation and stop_condition are required.

Example

fn main() {
    let mut evolution = EvolutionBuilder::new(30, 10, GeneCod::Bin, ())
        .with_fitness(YourFitness)
        .with_selection(TournamentSelection::default())
        .with_crossover(NPointsCrossover::default())
        .with_mutation(BitFlipMutation::default())
        .with_title("Max".to_string())
        .with_stop_condition(move |_, iterations, _| iterations >= 1000)
        .build().unwrap();
}

Implementations

impl<T: Individual> EvolutionBuilder<T>

pub fn new( population_size: u32, dimension: u32, gene_cod: GeneCod, range: T::RangeType, ) -> Self

pub fn from_config(config: EvolutionConfig<T>) -> Self

Helper method to create a new EvolutionBuilder from a EvolutionConfig.

pub fn with_fitness<F: Fitness<T>>(self, f: F) -> Self

Sets the fitness function. Receives a struct that implements the Fitness trait.

pub fn with_selection<S: Selection<T>>(self, s: S) -> Self

Sets the selection operator. Receives a struct that implements the Selection trait.

pub fn with_crossover<X: Crossover<T>>(self, c: X) -> Self

Sets the crossover operator. Receives a struct that implements the Crossover trait.

pub fn with_mutation<M: Mutation<T>>(self, m: M) -> Self

Sets the mutation operator. Receives a struct that implements the Mutation trait.

pub fn with_stop_condition<F: Fn(f64, u32, u32) -> bool + 'static + Send + Sync>( self, f: F, ) -> Self

Sets the stop condition. Receives a closure that receives the best fitness, the current iteration and the number of generations without improvement and returns a boolean.

Example

evolution_builder.with_stop_condition(|_, iterations, _| iterations >= 1000)

pub fn with_elitism(self, elitism: u32) -> Self

Number of elitist population members to ensure that keeps in the pool. Default is 1.

pub fn with_title(self, title: String) -> Self

Sets the title of the evolution to use when plotting. Defaults to "".

pub fn build(&self) -> Result<Evolution<T>, String>