CLinearStringKernel Class Reference

---

Detailed Description

Computes the standard linear kernel on dense char valued features.

Formally, it computes

Note: Basically the same as LinearByteKernel but on signed chars.

Definition at line 29 of file LinearStringKernel.h.

Inheritance diagram for CLinearStringKernel:

List of all members.

Public Member Functions
	CLinearStringKernel ()
	CLinearStringKernel (CStringFeatures< char > *l, CStringFeatures< char > *r)
virtual	~CLinearStringKernel ()
virtual bool	init (CFeatures *l, CFeatures *r)
virtual void	cleanup ()
virtual EKernelType	get_kernel_type ()
virtual const char *	get_name () const
virtual bool	init_optimization (int32_t num_suppvec, int32_t *sv_idx, float64_t *alphas)
virtual bool	delete_optimization ()
virtual float64_t	compute_optimized (int32_t idx)
virtual void	clear_normal ()
virtual void	add_to_normal (int32_t idx, float64_t weight)
Protected Member Functions
virtual float64_t	compute (int32_t idx_a, int32_t idx_b)
Protected Attributes
float64_t *	normal

---

Constructor & Destructor Documentation

CLinearStringKernel

(

)

constructor

Definition at line 19 of file LinearStringKernel.cpp.

CLinearStringKernel	(	CStringFeatures< char > *	l,
		CStringFeatures< char > *	r
	)

constructor

Parameters:

	l	features of left-hand side
	r	features of right-hand side

Definition at line 24 of file LinearStringKernel.cpp.

~CLinearStringKernel

(

)

[virtual]

Definition at line 31 of file LinearStringKernel.cpp.

---

Member Function Documentation

void add_to_normal	(	int32_t	idx,
		float64_t	weight
	)			[virtual]

add to normal

Parameters:

	idx	where to add
	weight	what to add

Reimplemented from CKernel.

Definition at line 54 of file LinearStringKernel.cpp.

void cleanup

(

)

[virtual]

clean up kernel

Reimplemented from CKernel.

Definition at line 42 of file LinearStringKernel.cpp.

void clear_normal

(

)

[virtual]

clear normal

Reimplemented from CKernel.

Definition at line 49 of file LinearStringKernel.cpp.

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

compute kernel function for features a and b idx_{a,b} denote the index of the feature vectors in the corresponding feature object

Parameters:

	idx_a	index a
	idx_b	index b

Returns:

computed kernel function at indices a,b

Implements CKernel.

Definition at line 66 of file LinearStringKernel.cpp.

float64_t compute_optimized

(

int32_t

idx

)

[virtual]

compute optimized

Parameters:

idx

index to compute

Returns:

optimized value at given index

Reimplemented from CKernel.

Definition at line 116 of file LinearStringKernel.cpp.

bool delete_optimization

(

)

[virtual]

delete optimization

Returns:

if deleting was successful

Reimplemented from CKernel.

Definition at line 108 of file LinearStringKernel.cpp.

virtual EKernelType get_kernel_type

(

)

[virtual]

return what type of kernel we are

Returns:

kernel type LINEAR

Implements CStringKernel< char >.

Definition at line 60 of file LinearStringKernel.h.

virtual const char* get_name

(

void

)

const [virtual]

return the kernel's name

Returns:

name Linear

Reimplemented from CStringKernel< char >.

Definition at line 69 of file LinearStringKernel.h.

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

initialize kernel

Parameters:

	l	features of left-hand side
	r	features of right-hand side

Returns:

if initializing was successful

Reimplemented from CStringKernel< char >.

Definition at line 36 of file LinearStringKernel.cpp.

bool init_optimization	(	int32_t	num_suppvec,
		int32_t *	sv_idx,
		float64_t *	alphas
	)			[virtual]

optimizable kernel, i.e. precompute normal vector and as phi(x) = x do scalar product in input space

Parameters:

	num_suppvec	number of support vectors
	sv_idx	support vector index
	alphas	alphas

Returns:

if optimization was successful

Reimplemented from CKernel.

Definition at line 80 of file LinearStringKernel.cpp.

---

Member Data Documentation

float64_t* normal [protected]

normal vector (used in case of optimized kernel)

Definition at line 118 of file LinearStringKernel.h.

---

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

• LinearStringKernel.h
• LinearStringKernel.cpp