Dune::PDELab::LocalMatrix< T, W > Class Template Reference

A dense matrix for storing data associated with the degrees of freedom of a pair of LocalFunctionSpaces. More...

#include <dune/pdelab/gridoperator/common/localmatrix.hh>

Public Types
typedef std::vector< T >	BaseContainer
	The type of the underlying storage container. More...
typedef BaseContainer::value_type	value_type
	The value type of this container.
typedef BaseContainer::size_type	size_type
	The size type of this container.
typedef BaseContainer::reference	reference
	The reference type of this container.
typedef BaseContainer::const_reference	const_reference
	The const reference type of this container.
typedef W	weight_type
	The weight type of this container. More...
typedef WeightedMatrixAccumulationView< LocalMatrix >	WeightedAccumulationView
	An accumulate-only view of this container that automatically applies a weight to all contributions.

Public Member Functions
	LocalMatrix ()
	Default constructor.
	LocalMatrix (size_type r, size_type c)
	Construct a LocalMatrix with r rows and c columns.
	LocalMatrix (size_type r, size_type c, const T &t)
	Construct a LocalMatrix with r rows and c columns and initialize its entries with t.
void	resize (size_type r, size_type c)
	Resize the matrix.
LocalMatrix &	operator= (const T &t)
	Assign t to all entries of the matrix.
void	assign (size_type r, size_type c, const T &t)
	Resize the matrix and assign t to all entries.
template<typename LFSU , typename LFSV >
T &	operator() (const LFSV &lfsv, size_type i, const LFSU &lfsu, size_type j)
	Access the value associated with the i-th DOF of lfsv and the j-th DOF of lfsu. More...
template<typename LFSU , typename LFSV >
const T &	operator() (const LFSV &lfsv, size_type i, const LFSU &lfsu, size_type j) const
	Access the value associated with the i-th DOF of lfsv and the j-th DOF of lfsu (const version). More...
LocalMatrix &	operator*= (const T &x)
	Multiplies all entries of the matrix with x.
size_type	nrows () const
	Returns the number of rows.
size_type	ncols () const
	Returns the number of columns.
template<class X , class R >
void	umv (const X &x, R &y) const
	y += A x
template<class X , class R >
void	usmv (const value_type &alpha, const X &x, R &y) const
	y += alpha A x
WeightedAccumulationView	weightedAccumulationView (weight_type weight)
	Returns a weighted accumulate-only view of this matrix with the given weight.
BaseContainer &	base ()
	Returns the underlying storage container. More...
const BaseContainer &	base () const
	Returns the underlying storage container (const version). More...
value_type &	getEntry (size_type i, size_type j)
	Direct (unmapped) access to the (i,j)-th entry of the matrix. More...
const value_type &	getEntry (size_type i, size_type j) const
	Direct (unmapped) access to the (i,j)-th entry of the matrix (const version). More...

Detailed Description

template<typename T, typename W = T>
class Dune::PDELab::LocalMatrix< T, W >

A dense matrix for storing data associated with the degrees of freedom of a pair of LocalFunctionSpaces.

This container represents a dense matrix based on a std::vector-like storage container and supports accessing its entries indexed by pairs of (LocalFunctionSpace,DOF of LocalFunctionSpace). If the LocalFunctionSpaces contain tags indicating whether they are trial or test spaces, the access methods will also assert that the first space is a test space and the second space is a trial space.

Template Parameters

T	The type of values to store in the matrix.
W	The type of weight applied in a WeightedAccumulationView.

Member Typedef Documentation

BaseContainer

template<typename T , typename W = T>

typedef std::vector<T> Dune::PDELab::LocalMatrix< T, W >::BaseContainer

The type of the underlying storage container.

Warning

This is not a matrix-like container anymore, but a std::vector-like one!

weight_type

template<typename T , typename W = T>

typedef W Dune::PDELab::LocalMatrix< T, W >::weight_type

The weight type of this container.

A value of this type will be used to assign a weight to contributions in a WeightedAccumulationView.

Member Function Documentation

base() [1/2]

template<typename T , typename W = T>

BaseContainer & Dune::PDELab::LocalMatrix< T, W >::base ( )

inline

Returns the underlying storage container.

Warning

This is not a matrix-like container anymore, but a std::vector-like one!

base() [2/2]

template<typename T , typename W = T>

const BaseContainer & Dune::PDELab::LocalMatrix< T, W >::base ( ) const

inline

Returns the underlying storage container (const version).

Warning

This is not a matrix-like container anymore, but a std::vector-like one!

getEntry() [1/2]

template<typename T , typename W = T>

value_type & Dune::PDELab::LocalMatrix< T, W >::getEntry ( size_type  i, size_type  j  )

inline

Direct (unmapped) access to the (i,j)-th entry of the matrix.

Note

This method is just a convenience method for helper function doing things like printing the matrix, as the BaseContainer is a linear std::vector-like object and does not know about the shape of the matrix anymore.

Warning

This method should normally not be called by normal users. Only use it if you really know what you are doing!

Referenced by Dune::PDELab::LocalMatrix< T, W >::operator()().

getEntry() [2/2]

template<typename T , typename W = T>

const value_type & Dune::PDELab::LocalMatrix< T, W >::getEntry ( size_type  i, size_type  j  ) const

inline

Direct (unmapped) access to the (i,j)-th entry of the matrix (const version).

Note

This method is just a convenience method for helper function doing things like printing the matrix, as the BaseContainer is a linear std::vector-like object and does not know about the shape of the matrix anymore.

Warning

This method should normally not be called by normal users. Only use it if you really know what you are doing!

operator()() [1/2]

template<typename T , typename W = T>

template<typename LFSU , typename LFSV >

T & Dune::PDELab::LocalMatrix< T, W >::operator() ( const LFSV &  lfsv, size_type  i, const LFSU &  lfsu, size_type  j  )

inline

Access the value associated with the i-th DOF of lfsv and the j-th DOF of lfsu.

Parameters

lfsv	The LocalFunctionSpace whose DOF will determine the row index of the entry.
i	The index of the DOF of lfsv that will determine the row index of the entry.
lfsu	The LocalFunctionSpace whose DOF will determine the column index of the entry.
j	The index of the DOF of lfsu that will determine the column index of the entry.

References Dune::PDELab::LocalMatrix< T, W >::getEntry().

operator()() [2/2]

template<typename T , typename W = T>

template<typename LFSU , typename LFSV >

const T & Dune::PDELab::LocalMatrix< T, W >::operator() ( const LFSV &  lfsv, size_type  i, const LFSU &  lfsu, size_type  j  ) const

inline

Access the value associated with the i-th DOF of lfsv and the j-th DOF of lfsu (const version).

Parameters

lfsv	The LocalFunctionSpace whose DOF will determine the row index of the entry.
i	The index of the DOF of lfsv that will determine the row index of the entry.
lfsu	The LocalFunctionSpace whose DOF will determine the column index of the entry.
j	The index of the DOF of lfsu that will determine the column index of the entry.

References Dune::PDELab::LocalMatrix< T, W >::getEntry().

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

• dune/pdelab/gridoperator/common/localmatrix.hh