The well known Gaussian kernel (swiss army knife for SVMs) on dense real valued features.
It is computed as
where is the kernel width.
Definition at line 31 of file GaussianKernel.h.
Public Member Functions | |
CGaussianKernel () | |
CGaussianKernel (int32_t size, float64_t width) | |
CGaussianKernel (CSimpleFeatures< float64_t > *l, CSimpleFeatures< float64_t > *r, float64_t width, int32_t size=10) | |
virtual | ~CGaussianKernel () |
virtual bool | init (CFeatures *l, CFeatures *r) |
virtual EKernelType | get_kernel_type () |
virtual const char * | get_name () const |
Protected Member Functions | |
virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
Protected Attributes | |
float64_t | width |
CGaussianKernel | ( | ) |
default constructor
Definition at line 24 of file GaussianKernel.cpp.
CGaussianKernel | ( | int32_t | size, | |
float64_t | width | |||
) |
constructor
size | cache size | |
width | width |
Definition at line 30 of file GaussianKernel.cpp.
CGaussianKernel | ( | CSimpleFeatures< float64_t > * | l, | |
CSimpleFeatures< float64_t > * | r, | |||
float64_t | width, | |||
int32_t | size = 10 | |||
) |
constructor
l | features of left-hand side | |
r | features of right-hand side | |
width | width | |
size | cache size |
Definition at line 35 of file GaussianKernel.cpp.
~CGaussianKernel | ( | ) | [virtual] |
Definition at line 42 of file GaussianKernel.cpp.
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.
Reimplemented in CGaussianShiftKernel.
Definition at line 52 of file GaussianKernel.cpp.
virtual EKernelType get_kernel_type | ( | ) | [virtual] |
return what type of kernel we are
Implements CKernel.
Reimplemented in CGaussianShiftKernel.
Definition at line 70 of file GaussianKernel.h.
virtual const char* get_name | ( | ) | const [virtual] |
return the kernel's name
Implements CSGObject.
Reimplemented in CGaussianShiftKernel.
Definition at line 76 of file GaussianKernel.h.
initialize kernel
l | features of left-hand side | |
r | features of right-hand side |
Reimplemented from CSimpleKernel< float64_t >.
Definition at line 46 of file GaussianKernel.cpp.
width
Definition at line 111 of file GaussianKernel.h.