strumpack::kernel::GaussKernel< scalar_t > Class Template Reference

Gaussian or radial basis function kernel. More...

#include <Kernel.hpp>

Inheritance diagram for strumpack::kernel::GaussKernel< scalar_t >:

Collaboration diagram for strumpack::kernel::GaussKernel< scalar_t >:

Public Member Functions
	GaussKernel (DenseMatrix< scalar_t > &data, scalar_t h, scalar_t lambda)
Public Member Functions inherited from strumpack::kernel::Kernel< scalar_t >
	Kernel (DenseM_t &data, scalar_t lambda)
virtual	~Kernel ()=default
std::size_t	n () const
std::size_t	d () const
virtual scalar_t	eval (std::size_t i, std::size_t j) const
void	operator() (const std::vector< std::size_t > &I, const std::vector< std::size_t > &J, DenseMatrix< real_t > &B) const
void	operator() (const std::vector< std::size_t > &I, const std::vector< std::size_t > &J, DenseMatrix< std::complex< real_t >> &B) const
DenseM_t	fit_HSS (std::vector< scalar_t > &labels, const HSS::HSSOptions< scalar_t > &opts)
std::vector< scalar_t >	predict (const DenseM_t &test, const DenseM_t &weights) const
DistM_t	fit_HSS (const BLACSGrid &grid, std::vector< scalar_t > &labels, const HSS::HSSOptions< scalar_t > &opts)
std::vector< scalar_t >	predict (const DenseM_t &test, const DistM_t &weights) const
DenseM_t	fit_HODLR (const MPIComm &c, std::vector< scalar_t > &labels, const HODLR::HODLROptions< scalar_t > &opts)
const DenseM_t &	data () const
DenseM_t &	data ()
std::vector< int > &	permutation ()
const std::vector< int > &	permutation () const
virtual void	permute ()

Detailed Description

template<typename scalar_t>
class strumpack::kernel::GaussKernel< scalar_t >

Gaussian or radial basis function kernel.

Implements the kernel: \(\exp \left( -\frac{\|x-y\|_2^2}{2 h^2} \right)\), with an extra regularization parameter lambda on the diagonal.

This is a subclass of Kernel. It only implements the (protected) eval_kernel_function routine, the rest of the functionality is inherited. To create your own kernel, simply copy this class, rename and change the eval_kernel_function implementation.

See also

Kernel, LaplaceKernel

Constructor & Destructor Documentation

GaussKernel()

template<typename scalar_t >

strumpack::kernel::GaussKernel< scalar_t >::GaussKernel ( DenseMatrix< scalar_t > &  data, scalar_t  h, scalar_t  lambda  )

inline

Constructor of the kernel object.

Parameters

data	Data defining the kernel matrix. data.rows() is the number of features, and data.cols() is the number of data points, ie, the dimension of the kernel matrix.
h	Kernel width
lambda	Regularization parameter, added to the diagonal

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The documentation for this class was generated from the following file:

• /home/pieterg/LBL/STRUMPACK/src/kernel/Kernel.hpp