ppforest2::leaf::MeanResponse Class Reference

Leaf creation by mean response value. More...

#include <MeanResponse.hpp>

Public Member Functions
std::string	display_name () const override
	Human-readable name for display in summaries.
std::set< types::Mode >	supported_modes () const override
	Training modes this strategy supports.
nlohmann::json	to_json () const override
	Serialize this strategy's configuration to JSON.
Public Member Functions inherited from ppforest2::leaf::LeafStrategy
TreeNode::Ptr	create_leaf (NodeContext const &ctx, stats::RNG &rng) const
	Create a leaf node for the given node context.
Public Member Functions inherited from Strategy< LeafStrategy >
virtual	~Strategy ()=default

Static Public Member Functions
static LeafStrategy::Ptr	from_json (nlohmann::json const &j)
Static Public Member Functions inherited from Strategy< LeafStrategy >
static Ptr	from_json (nlohmann::json const &j)
	Construct a strategy from its JSON representation.
static bool	register_strategy (std::string const &name, Factory factory)
	Register a concrete strategy for JSON deserialization.

Protected Member Functions
TreeNode::Ptr	compute (NodeContext const &ctx, stats::RNG &rng) const override
	Create a mean-response leaf from the node's observations.

Additional Inherited Members
Public Types inherited from Strategy< LeafStrategy >
using	Factory
	Factory function type for deserializing a strategy from JSON.
using	Ptr

Detailed Description

Leaf creation by mean response value.

Returns a TreeLeaf whose value is the mean of the continuous response for observations in this node. Used for regression trees.

Requires NodeContext::y_vec to be set (populated by the training pipeline for regression; null for classification).

Member Function Documentation

compute()

TreeNode::Ptr ppforest2::leaf::MeanResponse::compute ( NodeContext const & ctx, stats::RNG & rng ) const

overrideprotectedvirtual

Create a mean-response leaf from the node's observations.

Implements ppforest2::leaf::LeafStrategy.

display_name()

std::string ppforest2::leaf::MeanResponse::display_name ( ) const

inlineoverridevirtual

Human-readable name for display in summaries.

Implements Strategy< LeafStrategy >.

from_json()

static LeafStrategy::Ptr ppforest2::leaf::MeanResponse::from_json ( nlohmann::json const & j )

static

supported_modes()

std::set< types::Mode > ppforest2::leaf::MeanResponse::supported_modes ( ) const

inlineoverridevirtual

Training modes this strategy supports.

Every concrete strategy MUST explicitly declare which modes it supports — there is no default. This forces implementers to think about mode compatibility rather than silently inheriting both modes and triggering runtime surprises.

Used by TrainingSpec to validate that every selected strategy is compatible with the configured training mode. Fails fast at build time instead of silently misbehaving at train time.

Implements Strategy< LeafStrategy >.

to_json()

nlohmann::json ppforest2::leaf::MeanResponse::to_json ( ) const

overridevirtual

Serialize this strategy's configuration to JSON.

Must include a "name" field identifying the strategy type, plus any strategy-specific parameters.

Implements Strategy< LeafStrategy >.

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The documentation for this class was generated from the following file:

• core/src/models/strategies/leaf/MeanResponse.hpp