The class Kernel Normalizer defines a function to postprocess kernel values.
Formally it defines f(.,.,.)
examples for f(.,.,.) would be scaling with a constant
as can be found in class CAvgDiagKernelNormalizer, the identity (cf. CIdentityKernelNormalizer), dividing by the Square Root of the product of the diagonal elements which effectively normalizes the vectors in feature space to norm 1 (see CSqrtDiagKernelNormalizer)
Definition at line 42 of file KernelNormalizer.h.
Public Member Functions | |
CKernelNormalizer () | |
virtual | ~CKernelNormalizer () |
virtual bool | init (CKernel *k)=0 |
virtual float64_t | normalize (float64_t value, int32_t idx_lhs, int32_t idx_rhs)=0 |
virtual float64_t | normalize_lhs (float64_t value, int32_t idx_lhs)=0 |
virtual float64_t | normalize_rhs (float64_t value, int32_t idx_rhs)=0 |
default constructor
Definition at line 46 of file KernelNormalizer.h.
virtual ~CKernelNormalizer | ( | ) | [virtual] |
default destructor
Definition at line 48 of file KernelNormalizer.h.
virtual bool init | ( | CKernel * | k | ) | [pure virtual] |
initialization of the normalizer (if needed)
k | kernel |
Implemented in CAvgDiagKernelNormalizer, CDiceKernelNormalizer, CFirstElementKernelNormalizer, CIdentityKernelNormalizer, CMultitaskKernelNormalizer, CRidgeKernelNormalizer, CSqrtDiagKernelNormalizer, CTanimotoKernelNormalizer, and CVarianceKernelNormalizer.
normalize the kernel value
value | kernel value | |
idx_lhs | index of left hand side vector | |
idx_rhs | index of right hand side vector |
Implemented in CAvgDiagKernelNormalizer, CDiceKernelNormalizer, CFirstElementKernelNormalizer, CIdentityKernelNormalizer, CMultitaskKernelNormalizer, CRidgeKernelNormalizer, CSqrtDiagKernelNormalizer, CTanimotoKernelNormalizer, and CVarianceKernelNormalizer.
normalize only the left hand side vector
value | value of a component of the left hand side feature vector | |
idx_lhs | index of left hand side vector |
Implemented in CAvgDiagKernelNormalizer, CDiceKernelNormalizer, CFirstElementKernelNormalizer, CIdentityKernelNormalizer, CMultitaskKernelNormalizer, CRidgeKernelNormalizer, CSqrtDiagKernelNormalizer, CTanimotoKernelNormalizer, and CVarianceKernelNormalizer.
normalize only the right hand side vector
value | value of a component of the right hand side feature vector | |
idx_rhs | index of right hand side vector |
Implemented in CAvgDiagKernelNormalizer, CDiceKernelNormalizer, CFirstElementKernelNormalizer, CIdentityKernelNormalizer, CMultitaskKernelNormalizer, CRidgeKernelNormalizer, CSqrtDiagKernelNormalizer, CTanimotoKernelNormalizer, and CVarianceKernelNormalizer.