CWDFeatures Class Reference

Detailed Description

Features that compute the Weighted Degreee Kernel feature space explicitly.

See also:: CWeightedDegreeStringKernel

Definition at line 25 of file WDFeatures.h.

Inheritance diagram for CWDFeatures:

Public Member Functions
	CWDFeatures (CStringFeatures< uint8_t > *str, int32_t order, int32_t from_order)
	CWDFeatures (const CWDFeatures &orig)
virtual	~CWDFeatures ()
virtual int32_t	get_dim_feature_space ()
virtual float64_t	dot (int32_t vec_idx1, int32_t vec_idx2)
virtual float64_t	dense_dot (int32_t vec_idx1, const float64_t *vec2, int32_t vec2_len)
virtual void	add_to_dense_vec (float64_t alpha, int32_t vec_idx1, float64_t *vec2, int32_t vec2_len, bool abs_val=false)
virtual int32_t	get_nnz_features_for_vector (int32_t num)
virtual CFeatures *	duplicate () const
virtual EFeatureType	get_feature_type ()
virtual EFeatureClass	get_feature_class ()
virtual int32_t	get_num_vectors ()
virtual int32_t	get_size ()
virtual const char *	get_name () const
Protected Member Functions
void	set_normalization_const ()
void	set_wd_weights ()
Protected Attributes
CStringFeatures< uint8_t > *	strings
float64_t	normalization_const
int32_t	degree
int32_t	from_degree
int32_t	string_length
int32_t	num_strings
int32_t	alphabet_size
int32_t	w_dim
float64_t *	wd_weights

Constructor & Destructor Documentation

CWDFeatures::CWDFeatures	(	CStringFeatures< uint8_t > *	str,
		int32_t	order,
		int32_t	from_order
	)

constructor

Parameters:

	str	stringfeatures (of bytes)
	order	of wd kernel
	from_order	use first order weights from higher order weighting

Definition at line 14 of file WDFeatures.cpp.

CWDFeatures::CWDFeatures ( const CWDFeatures & orig )

copy constructor

Definition at line 35 of file WDFeatures.cpp.

CWDFeatures::~CWDFeatures ( ) [virtual]

destructor

Definition at line 50 of file WDFeatures.cpp.

Member Function Documentation

void CWDFeatures::add_to_dense_vec	(	float64_t	alpha,
		int32_t	vec_idx1,
		float64_t *	vec2,
		int32_t	vec2_len,
		bool	abs_val = `false`
	)			`[virtual]`

add vector 1 multiplied with alpha to dense vector2

Parameters:

	alpha	scalar alpha
	vec_idx1	index of first vector
	vec2	pointer to real valued vector
	vec2_len	length of real valued vector
	abs_val	if true add the absolute value

Implements CDotFeatures.

Definition at line 112 of file WDFeatures.cpp.

float64_t CWDFeatures::dense_dot	(	int32_t	vec_idx1,
		const float64_t *	vec2,
		int32_t	vec2_len
	)			`[virtual]`

compute dot product between vector1 and a dense vector

Parameters:

	vec_idx1	index of first vector
	vec2	pointer to real valued vector
	vec2_len	length of real valued vector

Implements CDotFeatures.

Definition at line 77 of file WDFeatures.cpp.

float64_t CWDFeatures::dot	(	int32_t	vec_idx1,
		int32_t	vec_idx2
	)			`[virtual]`

compute dot product between vector1 and vector2, appointed by their indices

Parameters:

	vec_idx1	index of first vector
	vec_idx2	index of second vector

Implements CDotFeatures.

Definition at line 55 of file WDFeatures.cpp.

CFeatures * CWDFeatures::duplicate ( ) const [virtual]

duplicate feature object

Returns:: feature object

Implements CFeatures.

Definition at line 173 of file WDFeatures.cpp.

virtual int32_t CWDFeatures::get_dim_feature_space ( ) [virtual]

obtain the dimensionality of the feature space

(not mix this up with the dimensionality of the input space, usually obtained via get_num_features())

Returns:: dimensionality

Implements CDotFeatures.

Definition at line 50 of file WDFeatures.h.

virtual EFeatureClass CWDFeatures::get_feature_class ( ) [virtual]

get feature class

Returns:: feature class

Implements CFeatures.

Definition at line 110 of file WDFeatures.h.

virtual EFeatureType CWDFeatures::get_feature_type ( ) [virtual]

get feature type

Returns:: templated feature type

Implements CFeatures.

Definition at line 101 of file WDFeatures.h.

virtual const char* CWDFeatures::get_name ( ) const [virtual]

Returns:: object name

Implements CSGObject.

Definition at line 126 of file WDFeatures.h.

virtual int32_t CWDFeatures::get_nnz_features_for_vector ( int32_t num ) [virtual]

get number of non-zero features in vector

Parameters:

num

which vector

Returns:: number of non-zero features in vector

Implements CDotFeatures.

Definition at line 86 of file WDFeatures.h.

virtual int32_t CWDFeatures::get_num_vectors ( ) [virtual]

get number of examples/vectors

abstract base method

Returns:: number of examples/vectors

Implements CFeatures.

Definition at line 115 of file WDFeatures.h.

virtual int32_t CWDFeatures::get_size ( ) [virtual]

get memory footprint of one feature

abstrace base method

Returns:: memory footprint of one feature

Implements CFeatures.

Definition at line 120 of file WDFeatures.h.

void CWDFeatures::set_normalization_const ( ) [protected]

set normalization constant

Definition at line 163 of file WDFeatures.cpp.

void CWDFeatures::set_wd_weights ( ) [protected]

create wd kernel weighting heuristic

Definition at line 148 of file WDFeatures.cpp.

Member Data Documentation

int32_t CWDFeatures::alphabet_size [protected]

size of alphabet

Definition at line 150 of file WDFeatures.h.

int32_t CWDFeatures::degree [protected]

degree

Definition at line 142 of file WDFeatures.h.

int32_t CWDFeatures::from_degree [protected]

from degree

Definition at line 144 of file WDFeatures.h.

float64_t CWDFeatures::normalization_const [protected]

normalization const

Definition at line 139 of file WDFeatures.h.

int32_t CWDFeatures::num_strings [protected]

number of strings

Definition at line 148 of file WDFeatures.h.

int32_t CWDFeatures::string_length [protected]

length of string in vector

Definition at line 146 of file WDFeatures.h.

CStringFeatures<uint8_t>* CWDFeatures::strings [protected]

Definition at line 136 of file WDFeatures.h.

int32_t CWDFeatures::w_dim [protected]

w dim

Definition at line 152 of file WDFeatures.h.

float64_t* CWDFeatures::wd_weights [protected]

wd weights

Definition at line 154 of file WDFeatures.h.

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

CWDFeatures Class Reference

Detailed Description

Public Member Functions

Protected Member Functions

Protected Attributes

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation