详细描述
class JensenMetric
The Jensen-Shannon distance/divergence measures the similarity between two data points which is based on the Kullback-Leibler divergence.
![\[\displaystyle d(\bf{x},\bf{x'}) = \sum_{i=0}^{n} x_{i} log\frac{x_{i}}{0.5(x_{i} +x'_{i})} + x'_{i} log\frac{x'_{i}}{0.5(x_{i}+x'_{i})} \]](form_55.png)
在文件JensenMetric.h第35行定义。
继承图，类CJensenMetric
公有成员 | |
| CJensenMetric () | |
| CJensenMetric (CSimpleFeatures< float64_t > *l, CSimpleFeatures< float64_t > *r) | |
| virtual | ~CJensenMetric () |
| virtual bool | init (CFeatures *l, CFeatures *r) |
| virtual void | cleanup () |
| virtual EDistanceType | get_distance_type () |
| virtual const char * | get_name () const |
保护成员 | |
| virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
构造及析构函数文档
| CJensenMetric | ( | ) |
default constructor
在文件JensenMetric.cpp第20行定义。
| CJensenMetric | ( | CSimpleFeatures< float64_t > * | l, | |
| CSimpleFeatures< float64_t > * | r | |||
| ) |
constructor
- 参数:
-
l features of left-hand side r features of right-hand side
在文件JensenMetric.cpp第25行定义。
| ~CJensenMetric | ( | ) | [virtual] |
在文件JensenMetric.cpp第31行定义。
成员函数文档
| void cleanup | ( | ) | [virtual] |
| float64_t compute | ( | int32_t | idx_a, | |
| int32_t | idx_b | |||
| ) | [protected, virtual] |
compute distance for features a and b idx_{a,b} denote the index of the feature vectors in the corresponding feature object
实现了CDistance。
在文件JensenMetric.cpp第47行定义。
| virtual EDistanceType get_distance_type | ( | ) | [virtual] |
| virtual const char* get_name | ( | ) | const [virtual] |
init distance
- 参数:
-
l features of left-hand side r features of right-hand side
- 返回:
- if init was successful
重载CSimpleDistance< float64_t >。
在文件JensenMetric.cpp第36行定义。
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