Generalizes binary classifiers to operate over multiclass types using the one vs all method. More...

#include <one_vs_all.h>

Inheritance diagram for meta::classify::one_vs_all:

Public Member Functions
template<class Function >
	one_vs_all (std::shared_ptr< index::forward_index > idx, Function &&create)
	Constructs a new one_vs_all classifier on the given index by using the given function to create binary_classifiers. More...

void	train (const std::vector< doc_id > &docs) override
	Creates a classification model based on training documents. More...

class_label	classify (doc_id d_id) override
	Classifies a document into a specific group, as determined by training data. More...

void	reset () override
	Clears any learning data associated with this classifier.

Public Member Functions inherited from meta::classify::classifier
	classifier (std::shared_ptr< index::forward_index > idx)

virtual confusion_matrix	test (const std::vector< doc_id > &docs)
	Classifies a collection document into specific groups, as determined by training data; this function will make repeated calls to classify(). More...

virtual confusion_matrix	cross_validate (const std::vector< doc_id > &input_docs, size_t k, bool even_split=false, int seed=1)
	Performs k-fold cross-validation on a set of documents. More...

Static Public Attributes
static const std::string	id = "one-vs-all"
	The identifier for this classifier.

Private Attributes
std::unordered_map< class_label, std::unique_ptr< binary_classifier > >	classifiers_
	The set of classifiers this ensemble uses for classification.

Additional Inherited Members
Protected Attributes inherited from meta::classify::classifier
std::shared_ptr< index::forward_index >	idx_
	the index that the classifer is run on

Detailed Description

Generalizes binary classifiers to operate over multiclass types using the one vs all method.

Constructor & Destructor Documentation

template<class Function >

meta::classify::one_vs_all::one_vs_all	(	std::shared_ptr< index::forward_index >	idx,
		Function &&	create
	)

inline

Constructs a new one_vs_all classifier on the given index by using the given function to create binary_classifiers.

The create parameter must take a single parameter: the positive label for the binary classifier to be created.

Parameters

idx	The forward_index to be passed to each binary_classifier created for the ensemble
create	A Callable (function object, lambda, etc.) that is used to create the individual binary_classifiers.

void meta::classify::one_vs_all::train ( const std::vector< doc_id > & docs )

overridevirtual

Creates a classification model based on training documents.

Parameters

docs	The training documents

class_label meta::classify::one_vs_all::classify ( doc_id d_id )

overridevirtual

Classifies a document into a specific group, as determined by training data.

Parameters

d_id	The document to classify

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