The well known Gaussian kernel (swiss army knife for SVMs) on sparse real valued features.
It is computed as
where is the kernel width.
在文件SparseGaussianKernel.h第32行定义。
公有成员 | |
CSparseGaussianKernel (int32_t size, float64_t width) | |
CSparseGaussianKernel (CSparseFeatures< float64_t > *l, CSparseFeatures< float64_t > *r, float64_t width) | |
virtual | ~CSparseGaussianKernel () |
virtual bool | init (CFeatures *l, CFeatures *r) |
virtual void | cleanup () |
virtual EKernelType | get_kernel_type () |
virtual EFeatureType | get_feature_type () |
virtual const char * | get_name () const |
保护成员 | |
virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
保护属性 | |
float64_t | width |
float64_t * | sq_lhs |
float64_t * | sq_rhs |
CSparseGaussianKernel | ( | int32_t | size, |
float64_t | width | ||
) |
CSparseGaussianKernel | ( | CSparseFeatures< float64_t > * | l, |
CSparseFeatures< float64_t > * | r, | ||
float64_t | width | ||
) |
constructor
l | features of left-hand side |
r | features of right-hand side |
width | width |
在文件SparseGaussianKernel.cpp第24行定义。
~CSparseGaussianKernel | ( | ) | [virtual] |
在文件SparseGaussianKernel.cpp第31行定义。
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 |
实现了CKernel。
在文件SparseGaussianKernel.cpp第68行定义。
virtual EFeatureType get_feature_type | ( | ) | [virtual] |
virtual EKernelType get_kernel_type | ( | ) | [virtual] |
return what type of kernel we are
实现了CKernel。
在文件SparseGaussianKernel.h第69行定义。
virtual const char* get_name | ( | ) | const [virtual] |
initialize kernel
l | features of left-hand side |
r | features of right-hand side |
free sq_{r,l}hs first
在文件SparseGaussianKernel.cpp第36行定义。
squared left-hand side
在文件SparseGaussianKernel.h第98行定义。
squared right-hand side
在文件SparseGaussianKernel.h第100行定义。
width
在文件SparseGaussianKernel.h第96行定义。