The standard Sigmoid kernel computed on dense real valued features.
Formally, it is computed as
在文件SigmoidKernel.h第28行定义。
公有成员 | |
CSigmoidKernel (int32_t size, float64_t gamma, float64_t coef0) | |
CSigmoidKernel (CSimpleFeatures< float64_t > *l, CSimpleFeatures< float64_t > *r, int32_t size, float64_t gamma, float64_t coef0) | |
virtual | ~CSigmoidKernel () |
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 | |
float64_t | gamma |
float64_t | coef0 |
CSigmoidKernel | ( | int32_t | size, | |
float64_t | gamma, | |||
float64_t | coef0 | |||
) |
CSigmoidKernel | ( | CSimpleFeatures< float64_t > * | l, | |
CSimpleFeatures< float64_t > * | r, | |||
int32_t | size, | |||
float64_t | gamma, | |||
float64_t | coef0 | |||
) |
constructor
l | features of left-hand side | |
r | features of right-hand side | |
size | cache size | |
gamma | gamma | |
coef0 | coefficient 0 |
在文件SigmoidKernel.cpp第26行定义。
~CSigmoidKernel | ( | ) | [virtual] |
在文件SigmoidKernel.cpp第33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SigmoidKernel.cpp第48行定义。
virtual EKernelType get_kernel_type | ( | ) | [virtual] |
virtual const char* get_name | ( | ) | const [virtual] |
initialize kernel
l | features of left-hand side | |
r | features of right-hand side |
在文件SigmoidKernel.cpp第38行定义。
coefficient 0
在文件SigmoidKernel.h第90行定义。
gamma
在文件SigmoidKernel.h第88行定义。