CRidgeKernelNormalizer类参考

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详细描述

Normalize the kernel by adding a constant term to its diagonal. This aids kernels to become positive definite (even though they are not - often caused by numerical problems).

Formally,

where E is a matrix with ones on the diagonal and R is the scalar ridge term. The ridge term R is computed as .

Typically,

• r=1e-10 and c=0.0 will add mean(diag(K))*1e-10 to the diagonal
• r=0.1 and c=1 will add 0.1 to the diagonal

In case c <= 0, c is compute as the mean of the kernel diagonal

在文件RidgeKernelNormalizer.h第43行定义。

继承图，类CRidgeKernelNormalizer

所有成员的列表。

公有成员
	CRidgeKernelNormalizer (float64_t r=1e-10, float64_t c=0.0)
virtual	~CRidgeKernelNormalizer ()
virtual bool	init (CKernel *k)
virtual float64_t	normalize (float64_t value, int32_t idx_lhs, int32_t idx_rhs)
virtual float64_t	normalize_lhs (float64_t value, int32_t idx_lhs)
virtual float64_t	normalize_rhs (float64_t value, int32_t idx_rhs)
virtual const char *	get_name () const
保护属性
float64_t	ridge
	the constant ridge to be added to the kernel diagonal
float64_t	scale
	scaling parameter (avg of diagonal)

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构造及析构函数文档

CRidgeKernelNormalizer	(	float64_t	r = 1e-10,
		float64_t	c = 0.0
	)

constructor

参数:

	r	ridge parameter
	c	scale parameter, if <= 0 scaling will be computed from the avg of the kernel diagonal elements

the scalar r*c will be added to the kernel diagonal, typical use cases:

• r=1e-10 and c=0.0 will add mean(diag(K))*1e-10 to the diagonal
• r=0.1 and c=1 will add 0.1 to the diagonal

在文件RidgeKernelNormalizer.h第56行定义。

virtual ~CRidgeKernelNormalizer

(

)

[virtual]

default destructor

在文件RidgeKernelNormalizer.h第63行定义。

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成员函数文档

virtual const char* get_name

(

)

const [virtual]

返回:

object name

实现了CSGObject。

在文件RidgeKernelNormalizer.h第130行定义。

virtual bool init

(

CKernel *

k

)

[virtual]

initialization of the normalizer (if needed)

参数:

k

kernel

实现了CKernelNormalizer。

在文件RidgeKernelNormalizer.h第69行定义。

virtual float64_t normalize	(	float64_t	value,
		int32_t	idx_lhs,
		int32_t	idx_rhs
	)			[virtual]

normalize the kernel value

参数:

	value	kernel value
	idx_lhs	index of left hand side vector
	idx_rhs	index of right hand side vector

实现了CKernelNormalizer。

在文件RidgeKernelNormalizer.h第100行定义。

virtual float64_t normalize_lhs	(	float64_t	value,
		int32_t	idx_lhs
	)			[virtual]

normalize only the left hand side vector

参数:

	value	value of a component of the left hand side feature vector
	idx_lhs	index of left hand side vector

实现了CKernelNormalizer。

在文件RidgeKernelNormalizer.h第113行定义。

virtual float64_t normalize_rhs	(	float64_t	value,
		int32_t	idx_rhs
	)			[virtual]

normalize only the right hand side vector

参数:

	value	value of a component of the right hand side feature vector
	idx_rhs	index of right hand side vector

实现了CKernelNormalizer。

在文件RidgeKernelNormalizer.h第123行定义。

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成员数据文档

float64_t ridge [protected]

the constant ridge to be added to the kernel diagonal

在文件RidgeKernelNormalizer.h第134行定义。

float64_t scale [protected]

scaling parameter (avg of diagonal)

在文件RidgeKernelNormalizer.h第136行定义。

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该类的文档由以下文件生成：

• RidgeKernelNormalizer.h