SHOGUN v0.9.0
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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
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.
在文件PolyMatchWordStringKernel.h第38行定义。
公有成员 | |
CPolyMatchWordStringKernel () | |
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 |
CPolyMatchWordStringKernel | ( | void | ) |
default constructor
在文件PolyMatchWordStringKernel.cpp第20行定义。
CPolyMatchWordStringKernel | ( | int32_t | size, |
int32_t | degree, | ||
bool | inhomogene | ||
) |
constructor
size | cache size |
degree | degree |
inhomogene | is inhomogeneous |
在文件PolyMatchWordStringKernel.cpp第26行定义。
CPolyMatchWordStringKernel | ( | CStringFeatures< uint16_t > * | l, |
CStringFeatures< uint16_t > * | r, | ||
int32_t | degree, | ||
bool | inhomogene | ||
) |
constructor
l | features of left-hand side |
r | features of right-hand side |
degree | degree |
inhomogene | is inhomogeneous |
在文件PolyMatchWordStringKernel.cpp第35行定义。
~CPolyMatchWordStringKernel | ( | ) | [virtual] |
在文件PolyMatchWordStringKernel.cpp第47行定义。
void cleanup | ( | ) | [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。
在文件PolyMatchWordStringKernel.cpp第63行定义。
virtual EKernelType get_kernel_type | ( | ) | [virtual] |
virtual const char* get_name | ( | void | ) | const [virtual] |
initialize kernel
l | features of left-hand side |
r | features of right-hand side |
在文件PolyMatchWordStringKernel.cpp第52行定义。
int32_t degree [protected] |
degree
在文件PolyMatchWordStringKernel.h第102行定义。
bool inhomogene [protected] |
if kernel is inhomogeneous
在文件PolyMatchWordStringKernel.h第104行定义。