#include <obliviouslambdamart.h>

Inheritance diagram for quickrank::learning::forests::ObliviousLambdaMart:

Public Member Functions
	ObliviousLambdaMart (size_t ntrees, double shrinkage, size_t nthresholds, size_t treedepth, size_t minleafsupport, size_t esr)
	Initializes a new ObliviousLambdaMart instance with the given learning parameters. More...

	ObliviousLambdaMart (const pugi::xml_document &model)

virtual	~ObliviousLambdaMart ()

virtual std::string	name () const
	Returns the name of the ranker. More...

virtual pugi::xml_document *	get_xml_model () const
	Return the xml model representing the current object. More...

Public Member Functions inherited from quickrank::learning::forests::LambdaMart
	LambdaMart (size_t ntrees, double shrinkage, size_t nthresholds, size_t ntreeleaves, size_t minleafsupport, size_t esr)
	Initializes a new LambdaMart instance with the given learning parameters. More...

	LambdaMart (const pugi::xml_document &model)
	Generates a LTR_Algorithm instance from a previously saved XML model. More...

virtual	~LambdaMart ()

Public Member Functions inherited from quickrank::learning::forests::Mart
	Mart (size_t ntrees, double shrinkage, size_t nthresholds, size_t ntreeleaves, size_t minleafsupport, size_t valid_iterations)
	Initializes a new Mart instance with the given learning parameters. More...

	Mart (const pugi::xml_document &model)
	Generates a LTR_Algorithm instance from a previously saved XML model. More...

virtual	~Mart ()

virtual void	learn (std::shared_ptr< data::Dataset > training_dataset, std::shared_ptr< data::Dataset > validation_dataset, std::shared_ptr< metric::ir::Metric > training_metric, size_t partial_save, const std::string output_basename)
	Start the learning process. More...

virtual Score	score_document (const Feature *d) const
	Returns the score by the current ranker. More...

virtual std::shared_ptr< std::vector< Score > >	partial_scores_document (const Feature *d) const
	Returns the partial scores of a given document, tree. More...

virtual void	print_additional_stats (void) const
	Print additional statistics. More...

virtual bool	update_weights (std::shared_ptr< std::vector< double >> weights)
	Update the weights for the ensemble models (only). More...

virtual std::shared_ptr< std::vector< double > >	get_weights () const
	Return the weights for the ensemble models (only). More...

Public Member Functions inherited from quickrank::learning::LTR_Algorithm
	LTR_Algorithm ()

	LTR_Algorithm (const pugi::xml_document &model)
	Generates a LTR_Algorithm instance from a previously saved XML model. More...

virtual	~LTR_Algorithm ()

	LTR_Algorithm (const LTR_Algorithm &other)=delete
	Avoid inefficient copy constructor. More...

LTR_Algorithm &	operator= (const LTR_Algorithm &)=delete
	Avoid inefficient copy assignment. More...

virtual void	score_dataset (std::shared_ptr< data::Dataset > dataset, Score *scores) const
	Given and input dateset, the current ranker generates scores for each instance and store the in the scores vector. More...

virtual void	save (std::string model_filename, int suffix=-1) const
	Save the current model to the output_file. More...

Static Public Attributes
static const std::string	NAME_ = "OBVLAMBDAMART"

Static Public Attributes inherited from quickrank::learning::forests::LambdaMart
static const std::string	NAME_ = "LAMBDAMART"

Static Public Attributes inherited from quickrank::learning::forests::Mart
static const std::string	NAME_ = "MART"

Protected Member Functions
virtual std::unique_ptr< RegressionTree >	fit_regressor_on_gradient (std::shared_ptr< data::VerticalDataset > training_dataset)
	Fits a regression tree on the gradient given by the pseudo residuals. More...

Protected Member Functions inherited from quickrank::learning::forests::LambdaMart
virtual void	init (std::shared_ptr< data::VerticalDataset > training_dataset)
	Prepares private data structurs befor training takes place. More...

virtual void	clear (size_t num_features)
	De-allocates private data structure after training has taken place. More...

virtual void	compute_pseudoresponses (std::shared_ptr< data::VerticalDataset > training_dataset, metric::ir::Metric *metric)
	Computes pseudo responses. More...

Protected Member Functions inherited from quickrank::learning::forests::Mart
virtual void	update_modelscores (std::shared_ptr< data::Dataset > dataset, Score scores, RegressionTree tree)
	Updates scores with the last learnt regression tree. More...

virtual void	update_modelscores (std::shared_ptr< data::VerticalDataset > dataset, Score scores, RegressionTree tree)

Protected Attributes
size_t	treedepth_

Protected Attributes inherited from quickrank::learning::forests::LambdaMart
double *	instance_weights_ = NULL

Protected Attributes inherited from quickrank::learning::forests::Mart
float **	thresholds_ = NULL

size_t *	thresholds_size_ = NULL

double *	scores_on_training_ = NULL

quickrank::Score *	scores_on_validation_ = NULL

size_t	validation_bestmodel_ = 0

double *	pseudoresponses_ = NULL

Ensemble	ensemble_model_

size_t	ntrees_

double	shrinkage_

size_t	nthresholds_

size_t	nleaves_

size_t	minleafsupport_

size_t	valid_iterations_

size_t **	sortedsid_ = NULL

size_t	sortedsize_ = 0

RTRootHistogram *	hist_ = NULL

Private Member Functions
virtual std::ostream &	put (std::ostream &os) const
	Prints the description of Algorithm, including its parameters. More...

Friends
std::ostream &	operator<< (std::ostream &os, const ObliviousLambdaMart &a)
	The output stream operator. More...

Additional Inherited Members
Static Public Member Functions inherited from quickrank::learning::LTR_Algorithm
static std::shared_ptr< LTR_Algorithm >	load_model_from_file (std::string model_filename)
	Load a model from a given XML file. More...

Constructor & Destructor Documentation

quickrank::learning::forests::ObliviousLambdaMart::ObliviousLambdaMart	(	size_t	ntrees,
		double	shrinkage,
		size_t	nthresholds,
		size_t	treedepth,
		size_t	minleafsupport,
		size_t	esr
	)

inline

Initializes a new ObliviousLambdaMart instance with the given learning parameters.

Parameters

ntrees	Maximum number of trees.
shrinkage	Learning rate.
nthresholds	Number of bins in discretization. 0 means no discretization.
treedepth	Maximum depth of each tree.
minleafsupport	Minimum number of instances in each leaf.
esr	Early stopping if no improvement after iterations on the validation set.

quickrank::learning::forests::ObliviousLambdaMart::ObliviousLambdaMart ( const pugi::xml_document & model )

virtual quickrank::learning::forests::ObliviousLambdaMart::~ObliviousLambdaMart ( )

inlinevirtual

Member Function Documentation

std::unique_ptr< RegressionTree > quickrank::learning::forests::ObliviousLambdaMart::fit_regressor_on_gradient ( std::shared_ptr< data::VerticalDataset > training_dataset )

protectedvirtual

Fits a regression tree on the gradient given by the pseudo residuals.

Parameters

training_dataset The dataset used for training

Reimplemented from quickrank::learning::forests::LambdaMart.

pugi::xml_document * quickrank::learning::forests::ObliviousLambdaMart::get_xml_model ( ) const

virtual

Return the xml model representing the current object.

Reimplemented from quickrank::learning::forests::Mart.

virtual std::string quickrank::learning::forests::ObliviousLambdaMart::name ( ) const

inlinevirtual

Returns the name of the ranker.

Reimplemented from quickrank::learning::forests::LambdaMart.

std::ostream & quickrank::learning::forests::ObliviousLambdaMart::put ( std::ostream & os ) const

privatevirtual

Prints the description of Algorithm, including its parameters.

Reimplemented from quickrank::learning::forests::Mart.

Friends And Related Function Documentation

std::ostream& operator<<	(	std::ostream &	os,
		const ObliviousLambdaMart &	a
	)

friend

The output stream operator.

Member Data Documentation

const std::string quickrank::learning::forests::ObliviousLambdaMart::NAME_ = "OBVLAMBDAMART"

static

size_t quickrank::learning::forests::ObliviousLambdaMart::treedepth_

protected

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

include/learning/forests/obliviouslambdamart.h
src/learning/forests/obliviouslambdamart.cc

Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Private Member Functions

Friends

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation