Public Member Functions | Protected Member Functions | Protected Attributes

CRationalQuadraticKernel Class Reference


Detailed Description

Rational Quadratic kernel.

Formally described as

\[ K(x,x') = 1 -\frac{\| x-x'\|^2}{\|x-x'\|^2 + coef} \]

Definition at line 35 of file RationalQuadraticKernel.h.

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

Public Member Functions

 CRationalQuadraticKernel ()
 CRationalQuadraticKernel (int32_t cache, float64_t coef, CDistance *dist)
 CRationalQuadraticKernel (CFeatures *l, CFeatures *r, float64_t c, CDistance *dist)
virtual bool init (CFeatures *l, CFeatures *r)
virtual EKernelType get_kernel_type ()
virtual EFeatureType get_feature_type ()
virtual EFeatureClass get_feature_class ()
virtual const char * get_name () const
virtual const float64_t get_coef () const
void set_coef (float64_t coef)
virtual ~CRationalQuadraticKernel ()

Protected Member Functions

virtual float64_t compute (int32_t idx_a, int32_t idx_b)

Protected Attributes

CDistancem_distance
 distance to be used
float64_t m_coef
 coefficient parameter of kernel

Constructor & Destructor Documentation

default constructor

Definition at line 16 of file RationalQuadraticKernel.cpp.

CRationalQuadraticKernel ( int32_t  cache,
float64_t  coef,
CDistance dist 
)

constructor

Parameters:
cache size of cache
coef kernel parameter coefficient
dist distance to be used

Definition at line 21 of file RationalQuadraticKernel.cpp.

CRationalQuadraticKernel ( CFeatures l,
CFeatures r,
float64_t  c,
CDistance dist 
)

constructor

Parameters:
l features left-side
r features right-side
c kernel parameter coefficient
dist distance to be used

Definition at line 29 of file RationalQuadraticKernel.cpp.

~CRationalQuadraticKernel (  )  [virtual]

Definition at line 38 of file RationalQuadraticKernel.cpp.


Member Function Documentation

float64_t compute ( int32_t  idx_a,
int32_t  idx_b 
) [protected, virtual]

compute kernel for specific feature vectors corresponding to [idx_a] of left-side and [idx_b] of right-side

Parameters:
idx_a left-side index
idx_b right-side index
Returns:
kernel value

Implements CKernel.

Definition at line 52 of file RationalQuadraticKernel.cpp.

virtual const float64_t get_coef (  )  const [virtual]
Returns:
coef - coefficient parameter of kernel

Definition at line 86 of file RationalQuadraticKernel.h.

virtual EFeatureClass get_feature_class (  )  [virtual]
Returns:
class of features

Implements CKernel.

Definition at line 76 of file RationalQuadraticKernel.h.

virtual EFeatureType get_feature_type (  )  [virtual]
Returns:
type of features

Implements CKernel.

Definition at line 71 of file RationalQuadraticKernel.h.

virtual EKernelType get_kernel_type (  )  [virtual]
Returns:
kernel type

Implements CKernel.

Definition at line 66 of file RationalQuadraticKernel.h.

virtual const char* get_name ( void   )  const [virtual]
Returns:
name of kernel

Implements CSGObject.

Definition at line 81 of file RationalQuadraticKernel.h.

bool init ( CFeatures l,
CFeatures r 
) [virtual]

initialize kernel with features

Parameters:
l features left-side
r features right-side
Returns:
true if successful

Reimplemented from CKernel.

Definition at line 44 of file RationalQuadraticKernel.cpp.

void set_coef ( float64_t  coef  ) 

setter for degree parameter

Parameters:
coef coefficient parameter of kernel

Definition at line 91 of file RationalQuadraticKernel.h.


Member Data Documentation

float64_t m_coef [protected]

coefficient parameter of kernel

Definition at line 113 of file RationalQuadraticKernel.h.

CDistance* m_distance [protected]

distance to be used

Definition at line 110 of file RationalQuadraticKernel.h.


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