Public Member Functions | Protected Member Functions | Protected Attributes

CTStudentKernel Class Reference


Detailed Description

Generalized T-Student kernel.

Formally described as

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

with degree=1 by default

Definition at line 35 of file TStudentKernel.h.

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

Public Member Functions

 CTStudentKernel ()
 CTStudentKernel (int32_t cache, float64_t d, CDistance *dist)
 CTStudentKernel (CFeatures *l, CFeatures *r, float64_t d, CDistance *dist)
virtual ~CTStudentKernel ()
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
float64_t get_degree ()
void set_degree (float64_t value)

Protected Member Functions

virtual float64_t compute (int32_t idx_a, int32_t idx_b)

Protected Attributes

CDistancedistance
 distance to be used
float64_t degree
 degree parameter of kernel

Constructor & Destructor Documentation

CTStudentKernel (  ) 

default constructor

Definition at line 23 of file TStudentKernel.cpp.

CTStudentKernel ( int32_t  cache,
float64_t  d,
CDistance dist 
)

constructor

Parameters:
cache size of cache
d kernel parameter degree
dist distance to be used

Definition at line 28 of file TStudentKernel.cpp.

CTStudentKernel ( CFeatures l,
CFeatures r,
float64_t  d,
CDistance dist 
)

constructor

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

Definition at line 36 of file TStudentKernel.cpp.

~CTStudentKernel (  )  [virtual]

Definition at line 45 of file TStudentKernel.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 59 of file TStudentKernel.cpp.

float64_t get_degree (  ) 

getter for degree parameter

Returns:
kernel parameter degree

Definition at line 88 of file TStudentKernel.h.

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

Implements CKernel.

Definition at line 78 of file TStudentKernel.h.

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

Implements CKernel.

Definition at line 73 of file TStudentKernel.h.

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

Implements CKernel.

Definition at line 68 of file TStudentKernel.h.

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

Implements CSGObject.

Definition at line 83 of file TStudentKernel.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 51 of file TStudentKernel.cpp.

void set_degree ( float64_t  value  ) 

setter for degree parameter

Parameters:
value kernel parameter degree

Definition at line 93 of file TStudentKernel.h.


Member Data Documentation

float64_t degree [protected]

degree parameter of kernel

Definition at line 104 of file TStudentKernel.h.

CDistance* distance [protected]

distance to be used

Definition at line 101 of file TStudentKernel.h.


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