Enum TreeUpdater

pub enum TreeUpdater {
    GrowColMaker,
    DistCol,
    GrowHistMaker,
    GrowLocalHistMaker,
    GrowSkMaker,
    Sync,
    Refresh,
    Prune,
}

Provides a modular way to construct and to modify the trees. This is an advanced parameter that is usually set automatically, depending on some other parameters. However, it could be also set explicitly by a user.

Variants

GrowColMaker

Non-distributed column-based construction of trees.

DistCol

Distributed tree construction with column-based data splitting mode.

GrowHistMaker

Distributed tree construction with row-based data splitting based on global proposal of histogram counting.

GrowLocalHistMaker

Based on local histogram counting.

GrowSkMaker

Uses the approximate sketching algorithm.

Sync

Synchronizes trees in all distributed nodes.

Refresh

Refreshes tree’s statistics and/or leaf values based on the current data. Note that no random subsampling of data rows is performed.

Prune

Prunes the splits where loss < min_split_loss (or gamma).

Trait Implementations

impl Clone for TreeUpdater

fn clone(&self) -> TreeUpdater

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ToString for TreeUpdater

fn to_string(&self) -> String

Converts the given value to a String.