CFirstElementKernelNormalizer Class Reference

Inheritance diagram for CFirstElementKernelNormalizer:

Inheritance graph
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List of all members.

Public Member Functions

 CFirstElementKernelNormalizer ()
virtual ~CFirstElementKernelNormalizer ()
virtual bool init (CKernel *k)
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)

Protected Attributes

float64_t scale
 scale constant obtained from k(0,0)


Detailed Description

Normalize the kernel by a constant obtained from the first element of the kernel matrix, i.e. $ c=k({\bf x},{\bf x})$

\[ k'(x,x')= \frac{k(x,x')}{c} \]

useful if the kernel returns constant elements along the diagonal anyway and all one wants is to scale the kernel down to 1 on the diagonal.

Definition at line 26 of file FirstElementKernelNormalizer.h.


Constructor & Destructor Documentation

CFirstElementKernelNormalizer::CFirstElementKernelNormalizer (  ) 

constructor

Definition at line 31 of file FirstElementKernelNormalizer.h.

virtual CFirstElementKernelNormalizer::~CFirstElementKernelNormalizer (  )  [virtual]

default destructor

Definition at line 36 of file FirstElementKernelNormalizer.h.


Member Function Documentation

virtual bool CFirstElementKernelNormalizer::init ( CKernel k  )  [virtual]

initialization of the normalizer (if needed)

Parameters:
k kernel

Implements CKernelNormalizer.

Definition at line 42 of file FirstElementKernelNormalizer.h.

virtual float64_t CFirstElementKernelNormalizer::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 62 of file FirstElementKernelNormalizer.h.

virtual float64_t CFirstElementKernelNormalizer::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

Implements CKernelNormalizer.

Definition at line 72 of file FirstElementKernelNormalizer.h.

virtual float64_t CFirstElementKernelNormalizer::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

Implements CKernelNormalizer.

Definition at line 81 of file FirstElementKernelNormalizer.h.


Member Data Documentation

scale constant obtained from k(0,0)

Definition at line 88 of file FirstElementKernelNormalizer.h.


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

SHOGUN Machine Learning Toolbox - Documentation