Detailed Description

The MultitaskKernel allows learning a piece-wise linear function (PLIF) via MKL.

Definition at line 26 of file MultitaskKernelPlifNormalizer.h.

Inheritance diagram for CMultitaskKernelPlifNormalizer:

Public Member Functions
	CMultitaskKernelPlifNormalizer ()
	CMultitaskKernelPlifNormalizer (std::vector< float64_t > support_, std::vector< int32_t > task_vector)
virtual float64_t	normalize (float64_t value, int32_t idx_lhs, int32_t idx_rhs)
int32_t	get_num_unique_tasks (std::vector< int32_t > vec)
virtual	~CMultitaskKernelPlifNormalizer ()
void	update_cache ()
float64_t	compute_task_similarity (int32_t task_a, int32_t task_b)
virtual std::vector< int32_t >	get_task_vector_lhs () const
virtual void	set_task_vector_lhs (std::vector< int32_t > vec)
virtual std::vector< int32_t >	get_task_vector_rhs () const
virtual void	set_task_vector_rhs (std::vector< int32_t > vec)
virtual void	set_task_vector (std::vector< int32_t > vec)
float64_t	get_task_distance (int32_t task_lhs, int32_t task_rhs)
void	set_task_distance (int32_t task_lhs, int32_t task_rhs, float64_t distance)
float64_t	get_task_similarity (int32_t task_lhs, int32_t task_rhs)
void	set_task_similarity (int32_t task_lhs, int32_t task_rhs, float64_t similarity)
float64_t	get_beta (int32_t idx)
void	set_beta (int32_t idx, float64_t weight)
int32_t	get_num_betas ()
virtual const char *	get_name () const
CMultitaskKernelPlifNormalizer *	KernelNormalizerToMultitaskKernelPlifNormalizer (CKernelNormalizer *n)
Public Member Functions inherited from CMultitaskKernelMklNormalizer
	CMultitaskKernelMklNormalizer ()
virtual bool	init (CKernel *k)
virtual float64_t	normalize_lhs (float64_t value, int32_t idx_lhs)
virtual float64_t	normalize_rhs (float64_t value, int32_t idx_rhs)
Public Member Functions inherited from CKernelNormalizer
	CKernelNormalizer ()
virtual	~CKernelNormalizer ()
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 Member Functions
virtual void	register_params ()

Protected Attributes
int32_t	num_tasks
int32_t	num_tasksqr
std::vector< int32_t >	task_vector_lhs
std::vector< int32_t >	task_vector_rhs
std::vector< float64_t >	distance_matrix
std::vector< float64_t >	similarity_matrix
int32_t	num_betas
std::vector< float64_t >	betas
std::vector< float64_t >	support
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

Constructor & Destructor Documentation

CMultitaskKernelPlifNormalizer ( )

default constructor

Definition at line 31 of file MultitaskKernelPlifNormalizer.h.

CMultitaskKernelPlifNormalizer	(	std::vector< float64_t >	support_,
		std::vector< int32_t >	task_vector
	)

constructor

Definition at line 40 of file MultitaskKernelPlifNormalizer.h.

virtual ~CMultitaskKernelPlifNormalizer ( )

virtual

default destructor

Definition at line 117 of file MultitaskKernelPlifNormalizer.h.

Member Function Documentation

float64_t compute_task_similarity	(	int32_t	task_a,
		int32_t	task_b
	)

derive similarity from distance with plif

Definition at line 142 of file MultitaskKernelPlifNormalizer.h.

float64_t get_beta ( int32_t idx )

virtual

Parameters

idx	index of MKL weight to get

Implements CMultitaskKernelMklNormalizer.

Definition at line 282 of file MultitaskKernelPlifNormalizer.h.

virtual const char* get_name ( ) const

virtual

Returns: object name

Reimplemented from CMultitaskKernelMklNormalizer.

Definition at line 314 of file MultitaskKernelPlifNormalizer.h.

int32_t get_num_betas ( )

virtual

Returns: number of kernel weights (support points)

Implements CMultitaskKernelMklNormalizer.

Definition at line 305 of file MultitaskKernelPlifNormalizer.h.

int32_t get_num_unique_tasks ( std::vector< int32_t > vec )

helper routine

Parameters

vec	vector with containing task_id for each example

Returns: number of unique task ids

Definition at line 100 of file MultitaskKernelPlifNormalizer.h.

float64_t get_task_distance	(	int32_t	task_lhs,
		int32_t	task_rhs
	)

Parameters

task_lhs	task_id on left hand side
task_rhs	task_id on right hand side

Returns: distance between tasks

Definition at line 222 of file MultitaskKernelPlifNormalizer.h.

float64_t get_task_similarity	(	int32_t	task_lhs,
		int32_t	task_rhs
	)

Parameters

task_lhs	task_id on left hand side
task_rhs	task_id on right hand side

Returns: similarity between tasks

Definition at line 253 of file MultitaskKernelPlifNormalizer.h.

virtual std::vector<int32_t> get_task_vector_lhs ( ) const

virtual

Returns: vec task vector with containing task_id for each example on left hand side

Definition at line 187 of file MultitaskKernelPlifNormalizer.h.

virtual std::vector<int32_t> get_task_vector_rhs ( ) const

virtual

Returns: vec task vector with containing task_id for each example on right hand side

Definition at line 199 of file MultitaskKernelPlifNormalizer.h.

CMultitaskKernelPlifNormalizer* KernelNormalizerToMultitaskKernelPlifNormalizer ( CKernelNormalizer * n )

casts kernel normalizer to multitask kernel plif normalizer

Parameters

n	kernel normalizer to cast

Definition at line 322 of file MultitaskKernelPlifNormalizer.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 75 of file MultitaskKernelPlifNormalizer.h.

virtual void register_params ( )

protectedvirtual

register the parameters

Reimplemented from CKernelNormalizer.

Definition at line 330 of file MultitaskKernelPlifNormalizer.h.

void set_beta	(	int32_t	idx,
		float64_t	weight
	)

virtual

Parameters

idx	index of MKL weight to set
weight	MKL weight to set

Implements CMultitaskKernelMklNormalizer.

Definition at line 293 of file MultitaskKernelPlifNormalizer.h.

void set_task_distance	(	int32_t	task_lhs,
		int32_t	task_rhs,
		float64_t	distance
	)

Parameters

task_lhs	task_id on left hand side
task_rhs	task_id on right hand side
distance	distance between tasks

Definition at line 237 of file MultitaskKernelPlifNormalizer.h.

void set_task_similarity	(	int32_t	task_lhs,
		int32_t	task_rhs,
		float64_t	similarity
	)

Parameters

task_lhs	task_id on left hand side
task_rhs	task_id on right hand side
similarity	similarity between tasks

Definition at line 268 of file MultitaskKernelPlifNormalizer.h.

virtual void set_task_vector ( std::vector< int32_t > vec )

virtual

Parameters

vec	task vector with containing task_id for each example

Definition at line 211 of file MultitaskKernelPlifNormalizer.h.

virtual void set_task_vector_lhs ( std::vector< int32_t > vec )

virtual

Parameters

vec	task vector with containing task_id for each example

Definition at line 193 of file MultitaskKernelPlifNormalizer.h.

virtual void set_task_vector_rhs ( std::vector< int32_t > vec )

virtual

Parameters

vec	task vector with containing task_id for each example

Definition at line 205 of file MultitaskKernelPlifNormalizer.h.

void update_cache ( )

update cache

Definition at line 123 of file MultitaskKernelPlifNormalizer.h.

Member Data Documentation

std::vector<float64_t> betas

protected

weights

Definition at line 361 of file MultitaskKernelPlifNormalizer.h.

std::vector<float64_t> distance_matrix

protected

MxM matrix encoding distance between tasks

Definition at line 352 of file MultitaskKernelPlifNormalizer.h.

int32_t num_betas

protected

number of weights

Definition at line 358 of file MultitaskKernelPlifNormalizer.h.

int32_t num_tasks

protected

number of tasks

Definition at line 341 of file MultitaskKernelPlifNormalizer.h.

int32_t num_tasksqr

protected

square of num_tasks – for registration purpose

Definition at line 343 of file MultitaskKernelPlifNormalizer.h.

std::vector<float64_t> similarity_matrix

protected

MxM matrix encoding similarity between tasks

Definition at line 355 of file MultitaskKernelPlifNormalizer.h.

std::vector<float64_t> support

protected

support points

Definition at line 364 of file MultitaskKernelPlifNormalizer.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 346 of file MultitaskKernelPlifNormalizer.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 349 of file MultitaskKernelPlifNormalizer.h.

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

MultitaskKernelPlifNormalizer.h

Detailed Description

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation