CAvgDiagKernelNormalizer Class Reference


Detailed Description

Normalize the kernel by either a constant or the average value of the diagonal elements (depending on argument c of the constructor).

In case c <= 0 compute scale as

\[ \mbox{scale} = \frac{1}{N}\sum_{i=1}^N k(x_i,x_i) \]

otherwise use scale=c and normalize the kernel via

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

Definition at line 30 of file AvgDiagKernelNormalizer.h.

Inheritance diagram for CAvgDiagKernelNormalizer:
Inheritance graph
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List of all members.

Public Member Functions

 CAvgDiagKernelNormalizer (float64_t c=0.0)
virtual ~CAvgDiagKernelNormalizer ()
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)
virtual const char * get_name () const

Protected Attributes

float64_t scale
 the constant scaling factor (avg of diagonal or user given const)

Constructor & Destructor Documentation

CAvgDiagKernelNormalizer::CAvgDiagKernelNormalizer ( float64_t  c = 0.0  ) 

constructor

Parameters:
c scale parameter, if <= 0 scaling will be computed from the avg of the kernel diagonal elements

Definition at line 38 of file AvgDiagKernelNormalizer.h.

virtual CAvgDiagKernelNormalizer::~CAvgDiagKernelNormalizer (  )  [virtual]

default destructor

Definition at line 44 of file AvgDiagKernelNormalizer.h.


Member Function Documentation

virtual const char* CAvgDiagKernelNormalizer::get_name (  )  const [virtual]
Returns:
object name

Implements CSGObject.

Definition at line 105 of file AvgDiagKernelNormalizer.h.

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

initialization of the normalizer (if needed)

Parameters:
k kernel

Implements CKernelNormalizer.

Definition at line 50 of file AvgDiagKernelNormalizer.h.

virtual float64_t CAvgDiagKernelNormalizer::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 80 of file AvgDiagKernelNormalizer.h.

virtual float64_t CAvgDiagKernelNormalizer::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 90 of file AvgDiagKernelNormalizer.h.

virtual float64_t CAvgDiagKernelNormalizer::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 99 of file AvgDiagKernelNormalizer.h.


Member Data Documentation

the constant scaling factor (avg of diagonal or user given const)

Definition at line 109 of file AvgDiagKernelNormalizer.h.


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

SHOGUN Machine Learning Toolbox - Documentation