Enum SplitPruningStrategyType

#[repr(i32)]
pub enum SplitPruningStrategyType {
    SplitPruneNone = 0,
    SplitPruneHalf = 1,
    SplitPruneQuarter = 2,
    SplitPrune10Percent = 3,
    SplitPruneHoeffding = 4,
}

Pruning strategies define how candidates are pruned over time. SPLIT_PRUNE_HALF prunes the worst half of splits every prune_ever_samples, etc. Note that prune_every_samples plays against the depth-dependent split_after_samples, so they should be set together.

Variants

SplitPruneNone = 0

SplitPruneHalf = 1

SplitPruneQuarter = 2

SplitPrune10Percent = 3

SplitPruneHoeffding = 4

SPLIT_PRUNE_HOEFFDING prunes splits whose Gini impurity is worst than the best split’s by more than the Hoeffding bound.

Implementations

impl SplitPruningStrategyType

pub fn is_valid(value: i32) -> bool

Returns true if value is a variant of SplitPruningStrategyType.

pub fn from_i32(value: i32) -> Option<SplitPruningStrategyType>

Converts an i32 to a SplitPruningStrategyType, or None if value is not a valid variant.

Trait Implementations

impl Clone for SplitPruningStrategyType

fn clone(&self) -> SplitPruningStrategyType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SplitPruningStrategyType

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

Formats the value using the given formatter.

impl Default for SplitPruningStrategyType

fn default() -> SplitPruningStrategyType

Returns the “default value” for a type.

impl From<SplitPruningStrategyType> for i32

fn from(value: SplitPruningStrategyType) -> i32

Converts to this type from the input type.

impl Hash for SplitPruningStrategyType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for SplitPruningStrategyType

fn cmp(&self, other: &SplitPruningStrategyType) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SplitPruningStrategyType

fn eq(&self, other: &SplitPruningStrategyType) -> 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 PartialOrd for SplitPruningStrategyType

fn partial_cmp(&self, other: &SplitPruningStrategyType) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for SplitPruningStrategyType

impl Eq for SplitPruningStrategyType

impl StructuralPartialEq for SplitPruningStrategyType