CKernelPCA Class Reference

Detailed Description

Preprocessor KernelPCA performs kernel principal component analysis.

Schoelkopf, B., Smola, A. J., & Mueller, K. R. (1999). Kernel Principal Component Analysis. Advances in kernel methods support vector learning, 1327(3), 327-352. MIT Press. Retrieved from http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.32.8744

Definition at line 35 of file KernelPCA.h.

Inheritance diagram for CKernelPCA:

Public Member Functions
	CKernelPCA ()
	CKernelPCA (CKernel *k)
virtual	~CKernelPCA ()
virtual bool	init (CFeatures *features)
	initialize preprocessor from features More...
virtual void	cleanup ()
	cleanup More...
virtual SGMatrix< float64_t >	apply_to_feature_matrix (CFeatures *features)
virtual SGVector< float64_t >	apply_to_feature_vector (SGVector< float64_t > vector)
virtual CSimpleFeatures < float64_t > *	apply_to_string_features (CFeatures *features)
SGMatrix< float64_t >	get_transformation_matrix () const
SGVector< float64_t >	get_bias_vector () const
virtual const char *	get_name () const
virtual EPreprocessorType	get_type () const
Public Member Functions inherited from CDimensionReductionPreprocessor
	CDimensionReductionPreprocessor ()
	CDimensionReductionPreprocessor (CEmbeddingConverter *converter)
virtual	~CDimensionReductionPreprocessor ()
void	set_target_dim (int32_t dim)
int32_t	get_target_dim () const
void	set_distance (CDistance *distance)
CDistance *	get_distance () const
void	set_kernel (CKernel *kernel)
CKernel *	get_kernel () const
Public Member Functions inherited from CSimplePreprocessor< float64_t >
	CSimplePreprocessor ()
virtual EFeatureClass	get_feature_class ()
	return that we are simple features (just fixed size matrices) More...
virtual EFeatureType	get_feature_type ()
	return feature type More...
Public Member Functions inherited from CPreprocessor
	CPreprocessor ()
virtual	~CPreprocessor ()
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)
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()
template<>
void	set_generic ()

Protected Member Functions
void	init ()
Protected Member Functions inherited from CDimensionReductionPreprocessor
void	init ()
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)

Protected Attributes
CFeatures *	m_init_features
SGMatrix< float64_t >	m_transformation_matrix
SGVector< float64_t >	m_bias_vector
bool	m_initialized
Protected Attributes inherited from CDimensionReductionPreprocessor
int32_t	m_target_dim
CDistance *	m_distance
CKernel *	m_kernel
CEmbeddingConverter *	m_converter

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

CKernelPCA

(

)

default constructor

Definition at line 29 of file KernelPCA.cpp.

CKernelPCA

(

CKernel *

k

)

constructor

Parameters

k	kernel to be used

Definition at line 34 of file KernelPCA.cpp.

~CKernelPCA ( )

virtual

Definition at line 61 of file KernelPCA.cpp.

Member Function Documentation

SGMatrix< float64_t > apply_to_feature_matrix ( CFeatures *  features )

virtual

apply preproc on feature matrix result in feature matrix return pointer to feature_matrix, i.e. f->get_feature_matrix();

Reimplemented from CDimensionReductionPreprocessor.

Definition at line 129 of file KernelPCA.cpp.

SGVector< float64_t > apply_to_feature_vector ( SGVector< float64_t >  vector )

virtual

apply preproc on single feature vector result in feature matrix

Reimplemented from CDimensionReductionPreprocessor.

Definition at line 161 of file KernelPCA.cpp.

CSimpleFeatures< float64_t > * apply_to_string_features ( CFeatures *  features )

virtual

apply to string features

Parameters

features

Definition at line 186 of file KernelPCA.cpp.

void cleanup ( )

virtual

cleanup

Reimplemented from CDimensionReductionPreprocessor.

Definition at line 53 of file KernelPCA.cpp.

SGVector<float64_t> get_bias_vector

(

)

const

get bias of KPCA

Definition at line 79 of file KernelPCA.h.

virtual const char* get_name ( ) const

virtual

Returns

object name

Reimplemented from CDimensionReductionPreprocessor.

Definition at line 85 of file KernelPCA.h.

SGMatrix<float64_t> get_transformation_matrix

(

)

const

get transformation matrix, i.e. eigenvectors

Definition at line 71 of file KernelPCA.h.

virtual EPreprocessorType get_type ( ) const

virtual

Returns

the type of preprocessor

Reimplemented from CDimensionReductionPreprocessor.

Definition at line 88 of file KernelPCA.h.

bool init ( CFeatures *  features )

virtual

initialize preprocessor from features

Reimplemented from CDimensionReductionPreprocessor.

Definition at line 68 of file KernelPCA.cpp.

void init ( )

protected

default init

Definition at line 40 of file KernelPCA.cpp.

Member Data Documentation

SGVector<float64_t> m_bias_vector

protected

bias vector

Definition at line 104 of file KernelPCA.h.

CFeatures* m_init_features

protected

features used by init. needed for apply

Definition at line 98 of file KernelPCA.h.

bool m_initialized

protected

true when already initialized

Definition at line 107 of file KernelPCA.h.

SGMatrix<float64_t> m_transformation_matrix

protected

transformation matrix

Definition at line 101 of file KernelPCA.h.

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

• KernelPCA.h
• KernelPCA.cpp