Computes the standard linear kernel on dense char valued features.
Formally, it computes
Note: Basically the same as LinearByteKernel but on signed chars.
Definition at line 29 of file LinearStringKernel.h.
Public Member Functions | |
CLinearStringKernel () | |
CLinearStringKernel (CStringFeatures< char > *l, CStringFeatures< char > *r) | |
virtual | ~CLinearStringKernel () |
virtual bool | init (CFeatures *l, CFeatures *r) |
virtual void | cleanup () |
virtual EKernelType | get_kernel_type () |
virtual const char * | get_name () const |
virtual bool | init_optimization (int32_t num_suppvec, int32_t *sv_idx, float64_t *alphas) |
virtual bool | delete_optimization () |
virtual float64_t | compute_optimized (int32_t idx) |
virtual void | clear_normal () |
virtual void | add_to_normal (int32_t idx, float64_t weight) |
Protected Member Functions | |
virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
Protected Attributes | |
float64_t * | normal |
constructor
Definition at line 19 of file LinearStringKernel.cpp.
CLinearStringKernel | ( | CStringFeatures< char > * | l, | |
CStringFeatures< char > * | r | |||
) |
constructor
l | features of left-hand side | |
r | features of right-hand side |
Definition at line 24 of file LinearStringKernel.cpp.
~CLinearStringKernel | ( | ) | [virtual] |
Definition at line 31 of file LinearStringKernel.cpp.
void add_to_normal | ( | int32_t | idx, | |
float64_t | weight | |||
) | [virtual] |
add to normal
idx | where to add | |
weight | what to add |
Reimplemented from CKernel.
Definition at line 54 of file LinearStringKernel.cpp.
void cleanup | ( | ) | [virtual] |
void clear_normal | ( | ) | [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 |
Implements CKernel.
Definition at line 66 of file LinearStringKernel.cpp.
float64_t compute_optimized | ( | int32_t | idx | ) | [virtual] |
compute optimized
idx | index to compute |
Reimplemented from CKernel.
Definition at line 116 of file LinearStringKernel.cpp.
bool delete_optimization | ( | ) | [virtual] |
delete optimization
Reimplemented from CKernel.
Definition at line 108 of file LinearStringKernel.cpp.
virtual EKernelType get_kernel_type | ( | ) | [virtual] |
return what type of kernel we are
Implements CStringKernel< char >.
Definition at line 60 of file LinearStringKernel.h.
virtual const char* get_name | ( | void | ) | const [virtual] |
return the kernel's name
Reimplemented from CStringKernel< char >.
Definition at line 69 of file LinearStringKernel.h.
initialize kernel
l | features of left-hand side | |
r | features of right-hand side |
Reimplemented from CStringKernel< char >.
Definition at line 36 of file LinearStringKernel.cpp.
bool init_optimization | ( | int32_t | num_suppvec, | |
int32_t * | sv_idx, | |||
float64_t * | alphas | |||
) | [virtual] |
optimizable kernel, i.e. precompute normal vector and as phi(x) = x do scalar product in input space
num_suppvec | number of support vectors | |
sv_idx | support vector index | |
alphas | alphas |
Reimplemented from CKernel.
Definition at line 80 of file LinearStringKernel.cpp.
normal vector (used in case of optimized kernel)
Definition at line 118 of file LinearStringKernel.h.