Computes the Spline Kernel function which is the cubic polynomial.
The formula is:
![\[ k({\bf x},{\bf x'})= 1 + {\bf x} \cdot {\bf x'} + {\bf x} \cdot {\bf x'} \cdot \mbox{min}(\bf x, \bf x') - \frac{\bf x + \bf x'}{2} \cdot \mbox{min}(\bf x, \bf x')^2 + \frac{ \mbox{min}(\bf x, \bf x')^3}{3} \]](form_163.png)
Definition at line 36 of file SplineKernel.h.
Public Member Functions | |
| CSplineKernel () | |
| CSplineKernel (CDotFeatures *l, CDotFeatures *r) | |
| virtual | ~CSplineKernel () |
| virtual bool | init (CFeatures *l, CFeatures *r) |
| virtual void | cleanup () |
| 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) |
| CSplineKernel | ( | ) |
constructor
Definition at line 21 of file SplineKernel.cpp.
| CSplineKernel | ( | CDotFeatures * | l, | |
| CDotFeatures * | r | |||
| ) |
constructor
| l | features of left-hand side | |
| r | features of right-hand side |
Definition at line 25 of file SplineKernel.cpp.
| ~CSplineKernel | ( | ) | [virtual] |
Definition at line 30 of file SplineKernel.cpp.
| 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 |
Reimplemented from CDotKernel.
Definition at line 52 of file SplineKernel.cpp.
| virtual EKernelType get_kernel_type | ( | ) | [virtual] |
return what type of kernel we are
Implements CDotKernel.
Definition at line 67 of file SplineKernel.h.
| virtual const char* get_name | ( | ) | const [virtual] |
return the kernel's name
Reimplemented from CDotKernel.
Definition at line 73 of file SplineKernel.h.
initialize kernel
| l | features of left-hand side | |
| r | features of right-hand side |
Reimplemented from CDotKernel.
Definition at line 35 of file SplineKernel.cpp.
