Detailed Description

The MultitaskKernel allows Multitask Learning via a modified kernel function based on taxonomy.

Definition at line 366 of file MultitaskKernelTreeNormalizer.h.

Inheritance diagram for CMultitaskKernelTreeNormalizer:

Public Member Functions
	CMultitaskKernelTreeNormalizer ()
	CMultitaskKernelTreeNormalizer (std::vector< std::string > task_lhs, std::vector< std::string > task_rhs, CTaxonomy tax)
virtual	~CMultitaskKernelTreeNormalizer ()
void	update_cache ()
virtual float64_t	normalize (float64_t value, int32_t idx_lhs, int32_t idx_rhs)
virtual float64_t	normalize_lhs (float64_t value, int32_t idx_lhs)
virtual float64_t	normalize_rhs (float64_t value, int32_t idx_rhs)
void	set_task_vector_lhs (std::vector< std::string > vec)
void	set_task_vector_rhs (std::vector< std::string > vec)
void	set_task_vector (std::vector< std::string > vec)
int32_t	get_num_betas ()
float64_t	get_beta (int32_t idx)
void	set_beta (int32_t idx, float64_t weight)
float64_t	get_node_similarity (int32_t node_lhs, int32_t node_rhs)
void	set_node_similarity (int32_t node_lhs, int32_t node_rhs, float64_t similarity)
virtual const char *	get_name () const
CMultitaskKernelTreeNormalizer *	KernelNormalizerToMultitaskKernelTreeNormalizer (CKernelNormalizer *n)
Public Member Functions inherited from CMultitaskKernelMklNormalizer
	CMultitaskKernelMklNormalizer ()
virtual bool	init (CKernel *k)
Public Member Functions inherited from CKernelNormalizer
	CKernelNormalizer ()
virtual	~CKernelNormalizer ()
virtual void	register_params ()
ENormalizerType	get_normalizer_type ()
void	set_normalizer_type (ENormalizerType type)
Public Member Functions inherited from CSGObject
	CSGObject ()
	CSGObject (const CSGObject &orig)
virtual	~CSGObject ()
virtual bool	is_generic (EPrimitiveType *generic) const
template<class T >
void	set_generic ()
void	unset_generic ()
virtual void	print_serializable (const char *prefix="")
virtual bool	save_serializable (CSerializableFile file, const char prefix="")
virtual bool	load_serializable (CSerializableFile file, const char prefix="")
void	set_global_io (SGIO *io)
SGIO *	get_global_io ()
void	set_global_parallel (Parallel *parallel)
Parallel *	get_global_parallel ()
void	set_global_version (Version *version)
Version *	get_global_version ()
SGVector< char * >	get_modelsel_names ()
char *	get_modsel_param_descr (const char *param_name)
index_t	get_modsel_param_index (const char *param_name)

Protected Attributes
CTaxonomy	taxonomy
int32_t	num_nodes
std::vector< int32_t >	task_vector_lhs
std::vector< int32_t >	task_vector_rhs
std::vector< float64_t >	dependency_matrix
Protected Attributes inherited from CMultitaskKernelMklNormalizer
float64_t	scale
Protected Attributes inherited from CKernelNormalizer
ENormalizerType	m_type

Additional Inherited Members
Public Attributes inherited from CSGObject
SGIO *	io
Parallel *	parallel
Version *	version
Parameter *	m_parameters
Parameter *	m_model_selection_parameters
Protected Member Functions inherited from CSGObject
virtual void	load_serializable_pre () throw (ShogunException)
virtual void	load_serializable_post () throw (ShogunException)
virtual void	save_serializable_pre () throw (ShogunException)
virtual void	save_serializable_post () throw (ShogunException)

Constructor & Destructor Documentation

CMultitaskKernelTreeNormalizer ( )

default constructor

Definition at line 375 of file MultitaskKernelTreeNormalizer.h.

CMultitaskKernelTreeNormalizer	(	std::vector< std::string >	task_lhs,
		std::vector< std::string >	task_rhs,
		CTaxonomy	tax
	)

default constructor

Parameters

task_lhs	task vector with containing task_id for each example for left hand side
task_rhs	task vector with containing task_id for each example for right hand side
tax	taxonomy

Definition at line 385 of file MultitaskKernelTreeNormalizer.h.

virtual ~CMultitaskKernelTreeNormalizer ( )

virtual

default destructor

Definition at line 403 of file MultitaskKernelTreeNormalizer.h.

Member Function Documentation

float64_t get_beta ( int32_t idx )

virtual

Parameters

idx	id of weight

Returns: weight of node with given id

Implements CMultitaskKernelMklNormalizer.

Definition at line 518 of file MultitaskKernelTreeNormalizer.h.

virtual const char* get_name ( ) const

virtual

Returns: object name

Reimplemented from CMultitaskKernelMklNormalizer.

Definition at line 570 of file MultitaskKernelTreeNormalizer.h.

float64_t get_node_similarity	(	int32_t	node_lhs,
		int32_t	node_rhs
	)

Parameters

node_lhs	node_id on left hand side
node_rhs	node_id on right hand side

Returns: similarity between nodes

Definition at line 543 of file MultitaskKernelTreeNormalizer.h.

int32_t get_num_betas ( )

virtual

Returns: number of parameters/weights

Implements CMultitaskKernelMklNormalizer.

Definition at line 508 of file MultitaskKernelTreeNormalizer.h.

CMultitaskKernelTreeNormalizer* KernelNormalizerToMultitaskKernelTreeNormalizer ( CKernelNormalizer * n )

casts kernel normalizer to multitask kernel tree normalizer

Parameters

n	kernel normalizer to cast

Definition at line 578 of file MultitaskKernelTreeNormalizer.h.

virtual float64_t normalize	(	float64_t	value,
		int32_t	idx_lhs,
		int32_t	idx_rhs
	)

virtual

normalize the kernel value

Parameters

value	kernel value
idx_lhs	index of left hand side vector
idx_rhs	index of right hand side vector

Implements CKernelNormalizer.

Definition at line 433 of file MultitaskKernelTreeNormalizer.h.

virtual float64_t normalize_lhs	(	float64_t	value,
		int32_t	idx_lhs
	)

virtual

normalize only the left hand side vector

Parameters

value	value of a component of the left hand side feature vector
idx_lhs	index of left hand side vector

Reimplemented from CMultitaskKernelMklNormalizer.

Definition at line 454 of file MultitaskKernelTreeNormalizer.h.

virtual float64_t normalize_rhs	(	float64_t	value,
		int32_t	idx_rhs
	)

virtual

normalize only the right hand side vector

Parameters

value	value of a component of the right hand side feature vector
idx_rhs	index of right hand side vector

Reimplemented from CMultitaskKernelMklNormalizer.

Definition at line 464 of file MultitaskKernelTreeNormalizer.h.

void set_beta	(	int32_t	idx,
		float64_t	weight
	)

virtual

Parameters

idx	id of weight
weight	weight of node with given id

Implements CMultitaskKernelMklNormalizer.

Definition at line 528 of file MultitaskKernelTreeNormalizer.h.

void set_node_similarity	(	int32_t	node_lhs,
		int32_t	node_rhs,
		float64_t	similarity
	)

Parameters

node_lhs	node_id on left hand side
node_rhs	node_id on right hand side
similarity	similarity between nodes

Definition at line 558 of file MultitaskKernelTreeNormalizer.h.

void set_task_vector ( std::vector< std::string > vec )

Parameters

vec	task vector with containing task_id for each example

Definition at line 501 of file MultitaskKernelTreeNormalizer.h.

void set_task_vector_lhs ( std::vector< std::string > vec )

Parameters

vec	task vector with containing task_id for each example

Definition at line 472 of file MultitaskKernelTreeNormalizer.h.

void set_task_vector_rhs ( std::vector< std::string > vec )

Parameters

vec	task vector with containing task_id for each example

Definition at line 488 of file MultitaskKernelTreeNormalizer.h.

void update_cache ( )

update cache

Definition at line 409 of file MultitaskKernelTreeNormalizer.h.

Member Data Documentation

std::vector<float64_t> dependency_matrix

protected

MxM matrix encoding similarity between tasks

Definition at line 597 of file MultitaskKernelTreeNormalizer.h.

int32_t num_nodes

protected

number of tasks

Definition at line 588 of file MultitaskKernelTreeNormalizer.h.

std::vector<int32_t> task_vector_lhs

protected

task vector indicating to which task each example on the left hand side belongs

Definition at line 591 of file MultitaskKernelTreeNormalizer.h.

std::vector<int32_t> task_vector_rhs

protected

task vector indicating to which task each example on the right hand side belongs

Definition at line 594 of file MultitaskKernelTreeNormalizer.h.

CTaxonomy taxonomy

protected

taxonomy

Definition at line 585 of file MultitaskKernelTreeNormalizer.h.

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

MultitaskKernelTreeNormalizer.h

Detailed Description

Public Member Functions

Protected Attributes

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation