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:

List of all members.

Public Member Functions
	CKernelPCA ()
	CKernelPCA (CKernel *k)
virtual	~CKernelPCA ()
virtual bool	init (CFeatures *features)
	initialize preprocessor from features
virtual void	cleanup ()
	cleanup
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
Protected Member Functions
void	init ()
Protected Attributes
CFeatures *	m_init_features
SGMatrix< float64_t >	m_transformation_matrix
SGVector< float64_t >	m_bias_vector
bool	m_initialized

---

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

Reimplemented from CDimensionReductionPreprocessor.

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.

---

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

• KernelPCA.h
• KernelPCA.cpp