Struct programinduction::pcfg::GeneticParams [−][src]
pub struct GeneticParams { pub progeny_factor: f64, pub mutation_point: f64, pub mutation_subtree: f64, pub mutation_reproduction: f64, }
Parameters for PCFG genetic programming (GP
).
Values for each mutation_
field should be probabilities that sum to 1. Every mutation will
randomly select one of these variants.
Fields
progeny_factor: f64
The progeny factor determines the distribution over nodes in a statement when a
node/subtree is randomly selected. If set to 1
, each node has uniform probability of
being chosen for mutation. If set to 2
, then every parent is half as likely to be chosen
than any one of its children.
mutation_point: f64
A point mutation replaces a single node with a valid rule that may take its place, without changing any children.
mutation_subtree: f64
A subtree mutation replaces a subtree with a valid sentence that may take its place.
mutation_reproduction: f64
A reproduction mutation is a no-op.
Trait Implementations
impl Default for GeneticParams
[src]
impl Default for GeneticParams
fn default() -> GeneticParams
[src]
fn default() -> GeneticParams
Returns the "default value" for a type. Read more
Auto Trait Implementations
impl Send for GeneticParams
impl Send for GeneticParams
impl Sync for GeneticParams
impl Sync for GeneticParams