详细描述
VarianceKernelNormalizer divides by the ``variance''.
This effectively normalizes the vectors in feature space to variance 1 (see CVarianceKernelNormalizer)
![\[ k'({\bf x},{\bf x'}) = \frac{k({\bf x},{\bf x'})}{\frac{1}{N}\sum_{i=1}^N k({\bf x}_i, {\bf x}_i) - \sum_{i,j=1}^N, k({\bf x}_i,{\bf x'}_j)/N^2} \]](form_125.png)
在文件VarianceKernelNormalizer.h第27行定义。
继承图，类CVarianceKernelNormalizer
公有成员 | |
| CVarianceKernelNormalizer () | |
| virtual | ~CVarianceKernelNormalizer () |
| virtual bool | init (CKernel *k) |
| virtual float64_t | normalize (float64_t value, int32_t idx_lhs, int32_t idx_rhs) |
| virtual float64_t | normalize_lhs (float64_t value, int32_t idx_lhs) |
| virtual float64_t | normalize_rhs (float64_t value, int32_t idx_rhs) |
| virtual const char * | get_name () const |
保护属性 | |
| float64_t | meandiff |
| float64_t | sqrt_meandiff |
构造及析构函数文档
default constructor
在文件VarianceKernelNormalizer.h第32行定义。
| virtual ~CVarianceKernelNormalizer | ( | ) | [virtual] |
default destructor
在文件VarianceKernelNormalizer.h第41行定义。
成员函数文档
| virtual const char* get_name | ( | void | ) | const [virtual] |
| virtual bool init | ( | CKernel * | k | ) | [virtual] |
normalize the kernel value
- 参数:
-
value kernel value idx_lhs index of left hand side vector idx_rhs index of right hand side vector
在文件VarianceKernelNormalizer.h第84行定义。
normalize only the left hand side vector
- 参数:
-
value value of a component of the left hand side feature vector idx_lhs index of left hand side vector
在文件VarianceKernelNormalizer.h第94行定义。
normalize only the right hand side vector
- 参数:
-
value value of a component of the right hand side feature vector idx_rhs index of right hand side vector
在文件VarianceKernelNormalizer.h第103行定义。
成员数据文档
scaling constant
在文件VarianceKernelNormalizer.h第113行定义。
float64_t sqrt_meandiff [protected] |
square root of scaling constant
在文件VarianceKernelNormalizer.h第115行定义。
该类的文档由以下文件生成：