SplitInfo

treeboost::tree

Struct SplitInfo 

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pub struct SplitInfo {
    pub feature_idx: usize,
    pub bin_threshold: u8,
    pub split_value: f64,
    pub gain: f32,
    pub left_gradient: f32,
    pub left_hessian: f32,
    pub left_count: u32,
    pub right_gradient: f32,
    pub right_hessian: f32,
    pub right_count: u32,
}
Expand description

Information about a potential split

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§feature_idx: usize

Feature index

§bin_threshold: u8

Bin threshold (samples with bin <= threshold go left)

§split_value: f64

Actual split value for raw prediction (samples with value <= split_value go left) This is populated from bin_boundaries during tree growth.

§gain: f32

Split gain (higher is better)

§left_gradient: f32

Left child gradient sum

§left_hessian: f32

Left child hessian sum

§left_count: u32

Left child sample count

§right_gradient: f32

Right child gradient sum

§right_hessian: f32

Right child hessian sum

§right_count: u32

Right child sample count

Implementations§

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impl SplitInfo

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pub fn is_valid(&self) -> bool

Check if this split is valid

Trait Implementations§

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impl Clone for SplitInfo

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fn clone(&self) -> SplitInfo

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for SplitInfo

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

Formats the value using the given formatter. Read more
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impl Default for SplitInfo

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Copy for SplitInfo

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