详细描述

The class PolyMatchWordStringKernel computes a variant of the polynomial kernel on word-features.

It makes sense for strings of same length mapped to word features and is computed as

$k({\bf x},{\bf x'})= (\sum_{i=0}^L I(x_i=x'_i)+c)^d$

where I is the indicator function which evaluates to 1 if its argument is true and to 0 otherwise.

Note that additional normalisation is applied, i.e.

$k'({\bf x}, {\bf x'})=\frac{k({\bf x}, {\bf x'})}{\sqrt{k({\bf x}, {\bf x})k({\bf x'}, {\bf x'})}}$

在文件PolyMatchWordStringKernel.h第38行定义。

继承图，类CPolyMatchWordStringKernel

[图例]

所有成员的列表。

公有成员
	CPolyMatchWordStringKernel (int32_t size, int32_t degree, bool inhomogene)
	CPolyMatchWordStringKernel (CStringFeatures< uint16_t > l, CStringFeatures< uint16_t > r, int32_t degree, bool inhomogene)
virtual	~CPolyMatchWordStringKernel ()
virtual bool	init (CFeatures l, CFeatures r)
virtual void	cleanup ()
virtual EKernelType	get_kernel_type ()
virtual const char *	get_name () const
保护成员
virtual float64_t	compute (int32_t idx_a, int32_t idx_b)
保护属性
int32_t	degree
bool	inhomogene

构造及析构函数文档

CPolyMatchWordStringKernel	(	int32_t	size,
		int32_t	degree,
		bool	inhomogene
	)

constructor

参数:

	size	cache size
	degree	degree
	inhomogene	is inhomogeneous

在文件PolyMatchWordStringKernel.cpp第20行定义。

CPolyMatchWordStringKernel	(	CStringFeatures< uint16_t > *	l,
		CStringFeatures< uint16_t > *	r,
		int32_t	degree,
		bool	inhomogene
	)

constructor

参数:

	l	features of left-hand side
	r	features of right-hand side
	degree	degree
	inhomogene	is inhomogeneous

在文件PolyMatchWordStringKernel.cpp第26行定义。

~CPolyMatchWordStringKernel ( ) [virtual]

在文件PolyMatchWordStringKernel.cpp第34行定义。

成员函数文档

void cleanup ( ) [virtual]

clean up kernel

重载CKernel。

在文件PolyMatchWordStringKernel.cpp第45行定义。

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

参数:

	idx_a	index a
	idx_b	index b

返回:: computed kernel function at indices a,b

实现了CKernel。

在文件PolyMatchWordStringKernel.cpp第50行定义。

virtual EKernelType get_kernel_type ( ) [virtual]

return what type of kernel we are

返回:: kernel type POLYMATCH

实现了CKernel。

在文件PolyMatchWordStringKernel.h第75行定义。

virtual const char* get_name ( ) const [virtual]

return the kernel's name

返回:: name PolyMatchWord

实现了CSGObject。

在文件PolyMatchWordStringKernel.h第81行定义。

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

initialize kernel

参数:

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

返回:: if initializing was successful

重载CStringKernel< uint16_t >。

在文件PolyMatchWordStringKernel.cpp第39行定义。

成员数据文档

int32_t degree [protected]

degree

在文件PolyMatchWordStringKernel.h第96行定义。

bool inhomogene [protected]

if kernel is inhomogeneous

在文件PolyMatchWordStringKernel.h第98行定义。

该类的文档由以下文件生成：

CPolyMatchWordStringKernel类参考

详细描述

公有成员

保护成员

保护属性

构造及析构函数文档

成员函数文档

成员数据文档