The LocalityImprovedString kernel is inspired by the polynomial kernel. Comparing neighboring characters it puts emphasize on local features.
It can be defined as
where if
and 0 otherwise.
在文件LocalityImprovedStringKernel.h第30行定义。
公有成员 | |
CLocalityImprovedStringKernel (int32_t size, int32_t length, int32_t inner_degree, int32_t outer_degree) | |
CLocalityImprovedStringKernel (CStringFeatures< char > *l, CStringFeatures< char > *r, int32_t length, int32_t inner_degree, int32_t outer_degree) | |
virtual | ~CLocalityImprovedStringKernel () |
virtual bool | init (CFeatures *l, CFeatures *r) |
virtual EKernelType | get_kernel_type () |
virtual const char * | get_name () const |
保护成员 | |
float64_t | compute (int32_t idx_a, int32_t idx_b) |
保护属性 | |
int32_t | length |
int32_t | inner_degree |
int32_t | outer_degree |
CLocalityImprovedStringKernel | ( | int32_t | size, | |
int32_t | length, | |||
int32_t | inner_degree, | |||
int32_t | outer_degree | |||
) |
constructor
size | cache size | |
length | length | |
inner_degree | inner degree | |
outer_degree | outer degree |
CLocalityImprovedStringKernel | ( | CStringFeatures< char > * | l, | |
CStringFeatures< char > * | r, | |||
int32_t | length, | |||
int32_t | inner_degree, | |||
int32_t | outer_degree | |||
) |
constructor
l | features of left-hand side | |
r | features of right-hand side | |
length | length | |
inner_degree | inner degree | |
outer_degree | outer degree |
~CLocalityImprovedStringKernel | ( | ) | [virtual] |
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
idx_a | index a | |
idx_b | index b |
实现了CKernel。
virtual EKernelType get_kernel_type | ( | ) | [virtual] |
return what type of kernel we are
实现了CKernel。
在文件LocalityImprovedStringKernel.h第69行定义。
virtual const char* get_name | ( | ) | const [virtual] |
return the kernel's name
实现了CSGObject。
在文件LocalityImprovedStringKernel.h第75行定义。
initialize kernel
l | features of left-hand side | |
r | features of right-hand side |
int32_t inner_degree [protected] |
inner degree
在文件LocalityImprovedStringKernel.h第92行定义。
int32_t length [protected] |
length
在文件LocalityImprovedStringKernel.h第90行定义。
int32_t outer_degree [protected] |
outer degree
在文件LocalityImprovedStringKernel.h第94行定义。