CGaussianShortRealKernel Class Reference

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Detailed Description

The well known Gaussian kernel (swiss army knife for SVMs) on dense short-real valued features.

It is computed as

where is the kernel width.

Definition at line 31 of file GaussianShortRealKernel.h.

Inheritance diagram for CGaussianShortRealKernel:

List of all members.

Public Member Functions
	CGaussianShortRealKernel (void)
	CGaussianShortRealKernel (int32_t size, float64_t width)
	CGaussianShortRealKernel (CSimpleFeatures< float32_t > *l, CSimpleFeatures< float32_t > *r, float64_t width, int32_t size=10)
virtual	~CGaussianShortRealKernel ()
virtual bool	init (CFeatures *l, CFeatures *r)
virtual EKernelType	get_kernel_type ()
virtual const char *	get_name () const
virtual void	register_params ()
Protected Member Functions
virtual float64_t	compute (int32_t idx_a, int32_t idx_b)
Protected Attributes
float64_t	width

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Constructor & Destructor Documentation

CGaussianShortRealKernel

(

void

)

default constructor

Definition at line 19 of file GaussianShortRealKernel.cpp.

CGaussianShortRealKernel	(	int32_t	size,
		float64_t	width
	)

constructor

Parameters:

	size	cache size
	width	width

Definition at line 25 of file GaussianShortRealKernel.cpp.

CGaussianShortRealKernel	(	CSimpleFeatures< float32_t > *	l,
		CSimpleFeatures< float32_t > *	r,
		float64_t	width,
		int32_t	size = 10
	)

constructor

Parameters:

	l	features of left-hand side
	r	features of right-hand side
	width	width
	size	cache size

Definition at line 31 of file GaussianShortRealKernel.cpp.

~CGaussianShortRealKernel

(

)

[virtual]

Definition at line 39 of file GaussianShortRealKernel.cpp.

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Member Function Documentation

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

Reimplemented from CDotKernel.

Definition at line 49 of file GaussianShortRealKernel.cpp.

virtual EKernelType get_kernel_type

(

)

[virtual]

return what type of kernel we are

Returns:

kernel type GAUSSIAN

Implements CDotKernel.

Definition at line 68 of file GaussianShortRealKernel.h.

virtual const char* get_name

(

void

)

const [virtual]

return the kernel's name

Returns:

name GaussianShortReal

Reimplemented from CDotKernel.

Definition at line 74 of file GaussianShortRealKernel.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 CDotKernel.

Definition at line 43 of file GaussianShortRealKernel.cpp.

void register_params

(

)

[virtual]

register the parameters

Reimplemented from CKernel.

Definition at line 70 of file GaussianShortRealKernel.cpp.

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Member Data Documentation

float64_t width [protected]

width

Definition at line 92 of file GaussianShortRealKernel.h.

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

• GaussianShortRealKernel.h
• GaussianShortRealKernel.cpp