ppforest2::TreeNode Struct Reference

Abstract base class for nodes in a projection pursuit tree. More...

#include <TreeNode.hpp>

Classes
struct	Visitor
	Visitor interface for tree node dispatch. More...

Public Types
using	Ptr = std::unique_ptr<TreeNode>

Public Member Functions
virtual	~TreeNode ()=default
virtual void	accept (Visitor &visitor) const =0
	Accept a tree node visitor (double dispatch).
virtual Ptr	clone () const =0
	Deep copy of this node and its subtree.
virtual bool	equals (TreeNode const &other) const =0
	Structural equality comparison (value-based).
virtual int	group_count () const =0
	Number of distinct groups reachable from this node.
virtual bool	is_leaf () const =0
	Whether this node is a leaf (TreeResponse).
virtual std::set< types::Response >	node_groups () const =0
	Sorted set of group labels reachable from this node.
bool	operator!= (TreeNode const &other) const
bool	operator== (TreeNode const &other) const
virtual types::Response	predict (types::FeatureVector const &data) const =0
	Predict the group label for a single observation.
virtual types::Response	response () const =0
	The group label at this node (leaf value or majority group).

Public Attributes
bool	degenerate = false
	Whether this node (or any descendant) had a degenerate split.

Detailed Description

Abstract base class for nodes in a projection pursuit tree.

A tree is a recursive structure of nodes: internal split nodes (TreeCondition) that project and threshold, and leaf nodes (TreeResponse) that hold a group label.

Member Typedef Documentation

Ptr

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

Constructor & Destructor Documentation

~TreeNode()

virtual ppforest2::TreeNode::~TreeNode ( )

virtualdefault

Member Function Documentation

accept()

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

pure virtual

Accept a tree node visitor (double dispatch).

Implemented in ppforest2::TreeCondition, and ppforest2::TreeResponse.

clone()

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

pure virtual

Deep copy of this node and its subtree.

Implemented in ppforest2::TreeCondition, and ppforest2::TreeResponse.

equals()

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

pure virtual

Structural equality comparison (value-based).

Implemented in ppforest2::TreeCondition, and ppforest2::TreeResponse.

group_count()

virtual int ppforest2::TreeNode::group_count ( ) const

pure virtual

Number of distinct groups reachable from this node.

Implemented in ppforest2::TreeCondition, and ppforest2::TreeResponse.

is_leaf()

virtual bool ppforest2::TreeNode::is_leaf ( ) const

pure virtual

Whether this node is a leaf (TreeResponse).

Implemented in ppforest2::TreeCondition, and ppforest2::TreeResponse.

node_groups()

virtual std::set< types::Response > ppforest2::TreeNode::node_groups ( ) const

pure virtual

Sorted set of group labels reachable from this node.

Implemented in ppforest2::TreeCondition, and ppforest2::TreeResponse.

operator!=()

bool ppforest2::TreeNode::operator!=

(

TreeNode const &

other

)

const

operator==()

bool ppforest2::TreeNode::operator==

(

TreeNode const &

other

)

const

predict()

virtual types::Response ppforest2::TreeNode::predict ( types::FeatureVector const & data ) const

pure virtual

Predict the group label for a single observation.

Parameters

data	Feature vector (p).

Returns

Predicted group label.

Implemented in ppforest2::TreeCondition, and ppforest2::TreeResponse.

response()

virtual types::Response ppforest2::TreeNode::response ( ) const

pure virtual

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

Implemented in ppforest2::TreeCondition, and ppforest2::TreeResponse.

Member Data Documentation

degenerate

bool ppforest2::TreeNode::degenerate = false

Whether this node (or any descendant) had a degenerate split.

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

• core/src/models/TreeNode.hpp