CGaussianKernel Class Reference
Detailed Description
The well known Gaussian kernel (swiss army knife for SVMs) on dense real valued features is computed as
![\[ k({\bf x},{\bf x'})= exp(-\frac{||{\bf x}-{\bf x'}||^2}{\tau}) \]](form_53.png)
where 
is the kernel width.
Definition at line 27 of file GaussianKernel.h.
Public Member Functions | |
| CGaussianKernel (int32_t size, float64_t width) | |
| CGaussianKernel (CRealFeatures *l, CRealFeatures *r, float64_t width, int32_t size=10) | |
| virtual | ~CGaussianKernel () |
| virtual bool | init (CFeatures *l, CFeatures *r) |
| virtual bool | load_init (FILE *src) |
| virtual bool | save_init (FILE *dest) |
| virtual EKernelType | get_kernel_type () |
| virtual const char * | get_name () |
Protected Member Functions | |
| virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
Protected Attributes | |
| float64_t | width |
Constructor & Destructor Documentation
| CGaussianKernel::CGaussianKernel | ( | int32_t | size, | |
| float64_t | width | |||
| ) |
constructor
- Parameters:
-
size cache size width width
Definition at line 17 of file GaussianKernel.cpp.
| CGaussianKernel::CGaussianKernel | ( | CRealFeatures * | l, | |
| CRealFeatures * | r, | |||
| float64_t | width, | |||
| int32_t | size = 10 | |||
| ) |
constructor
- Parameters:
-
l features of left-hand side r features of right-hand side width width size cache size
Definition at line 22 of file GaussianKernel.cpp.
| CGaussianKernel::~CGaussianKernel | ( | ) | [virtual] |
Definition at line 29 of file GaussianKernel.cpp.
Member Function Documentation
initialize kernel
- Parameters:
-
l features of left-hand side r features of right-hand side
- Returns:
- if initializing was successful
Reimplemented from CSimpleKernel< ST >.
Definition at line 33 of file GaussianKernel.cpp.
| bool CGaussianKernel::load_init | ( | FILE * | src | ) | [virtual] |
load kernel init_data
- Parameters:
-
src file to load from
- Returns:
- if loading was successful
Implements CKernel.
Definition at line 39 of file GaussianKernel.cpp.
| bool CGaussianKernel::save_init | ( | FILE * | dest | ) | [virtual] |
save kernel init_data
- Parameters:
-
dest file to save to
- Returns:
- if saving was successful
Implements CKernel.
Definition at line 44 of file GaussianKernel.cpp.
| virtual EKernelType CGaussianKernel::get_kernel_type | ( | ) | [virtual] |
return what type of kernel we are
- Returns:
- kernel type GAUSSIAN
Implements CKernel.
Reimplemented in CGaussianShiftKernel.
Definition at line 75 of file GaussianKernel.h.
| virtual const char* CGaussianKernel::get_name | ( | ) | [virtual] |
return the kernel's name
- Returns:
- name Gaussian
Implements CKernel.
Reimplemented in CGaussianShiftKernel.
Definition at line 81 of file GaussianKernel.h.
| float64_t CGaussianKernel::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
- Parameters:
-
idx_a index a idx_b index b
- Returns:
- computed kernel function at indices a,b
Implements CKernel.
Reimplemented in CGaussianShiftKernel.
Definition at line 49 of file GaussianKernel.cpp.
Member Data Documentation
float64_t CGaussianKernel::width [protected] |
width
Definition at line 96 of file GaussianKernel.h.
The documentation for this class was generated from the following files: