ppforest2::TreeLeaf Class Reference

Leaf node in a projection pursuit tree. More...

#include <TreeLeaf.hpp>

Public Types
using	Ptr = std::unique_ptr<TreeLeaf>
Public Types inherited from ppforest2::TreeNode
using	Ptr = std::unique_ptr<TreeNode>

Public Member Functions
	TreeLeaf (types::Outcome value)
void	accept (TreeNode::Visitor &visitor) const override
	Accept a tree node visitor (double dispatch).
TreeNode::Ptr	clone () const override
	Deep copy of this node and its subtree.
bool	equals (TreeNode const &other) const override
	Structural equality comparison (value-based).
int	group_count () const override
	Number of distinct groups reachable from this node.
std::set< types::GroupId >	node_groups () const override
	Sorted set of group labels reachable from this node.
types::Outcome	predict (types::FeatureVector const &x) const override
	Return the stored class label (ignores input).
types::Outcome	response () const override
	The group label at this node (leaf value or majority group).
Public Member Functions inherited from ppforest2::TreeNode
virtual	~TreeNode ()=default
bool	operator!= (TreeNode const &other) const
bool	operator== (TreeNode const &other) const

Static Public Member Functions
static Ptr	make (types::Outcome value)
	Factory method that returns a unique_ptr to a new TreeLeaf.

Public Attributes
types::Outcome	value
	Class label stored at this leaf.
Public Attributes inherited from ppforest2::TreeNode
bool	degenerate = false
	Whether this node (or any descendant) had a degenerate split.

Detailed Description

Leaf node in a projection pursuit tree.

Holds a single class label and always returns it as the prediction, regardless of the input feature vector.

Member Typedef Documentation

Ptr

using ppforest2::TreeLeaf::Ptr = std::unique_ptr<TreeLeaf>

Constructor & Destructor Documentation

TreeLeaf()

ppforest2::TreeLeaf::TreeLeaf ( types::Outcome value )

explicit

Member Function Documentation

accept()

void ppforest2::TreeLeaf::accept ( TreeNode::Visitor & visitor ) const

overridevirtual

Accept a tree node visitor (double dispatch).

Implements ppforest2::TreeNode.

clone()

TreeNode::Ptr ppforest2::TreeLeaf::clone ( ) const

overridevirtual

Deep copy of this node and its subtree.

Implements ppforest2::TreeNode.

equals()

bool ppforest2::TreeLeaf::equals ( TreeNode const & other ) const

overridevirtual

Structural equality comparison (value-based).

Implements ppforest2::TreeNode.

group_count()

int ppforest2::TreeLeaf::group_count ( ) const

inlineoverridevirtual

Number of distinct groups reachable from this node.

Implements ppforest2::TreeNode.

make()

static Ptr ppforest2::TreeLeaf::make ( types::Outcome value )

static

Factory method that returns a unique_ptr to a new TreeLeaf.

node_groups()

std::set< types::GroupId > ppforest2::TreeLeaf::node_groups ( ) const

inlineoverridevirtual

Sorted set of group labels reachable from this node.

Implements ppforest2::TreeNode.

predict()

types::Outcome ppforest2::TreeLeaf::predict ( types::FeatureVector const & x ) const

overridevirtual

Return the stored class label (ignores input).

Parameters

x	Feature vector (unused).

Returns

The class label stored at this leaf.

Implements ppforest2::TreeNode.

response()

types::Outcome ppforest2::TreeLeaf::response ( ) const

overridevirtual

The group label at this node (leaf value or majority group).

Implements ppforest2::TreeNode.

Member Data Documentation

value

types::Outcome ppforest2::TreeLeaf::value

Class label stored at this leaf.

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

• core/src/models/TreeLeaf.hpp