TDenseMBuilder< T > Class Template Reference

Creates matrices by computing low rank approximations of dense sub matrices, e.g. via ACA or SVD.

#include <TMatBuilder.hh>

Inheritance diagram for TDenseMBuilder< T >:

Classes
struct	stat_t
	statistical data of computations More...

Public Member Functions
	TDenseMBuilder (const coeff_fn_t *coeff_fn, const TLowRankApx *lr_apx, const bool recompress=CFG::Arith::recompress, const bool cvt_to_dense=CFG::Arith::convert_to_dense, stat_t *stat=NULL)
void	set_recompression (const bool b)
	(de-) activate recompression of low-rank blocks
void	set_stat (stat_t *stat)
	assign statistics object
virtual TMatrix *	build_leaf (const TBlockCluster *bc, const matform_t matformat, const TTruncAcc &acc) const
	construct matrices for leaves in the block cluster tree
virtual TMatrix *	build_ghost (const TBlockCluster *bc) const
	build placeholder matrix for remote blocks
Public Member Functions inherited from TMatBuilder
	TMatBuilder (const bool coarsening=CFG::Arith::coarsen_build)
void	set_coarsening (const bool b)
	(de-) activate coarsening with standard accuracy
void	set_coarsening (const TTruncAcc &acc)
	activate coarsening with accuracy acc
virtual TMatrix *	build (const uint nthreads, const TBlockClusterTree *bct, const TTruncAcc &acc, TProgressBar *progress=NULL) const
	build the H-matrix with block-wise accuracy defined by acc
virtual TMatrix *	build (const uint nthreads, const TBlockCluster *bc, const TTruncAcc &acc, TProgressBar *progress=NULL) const
virtual TMatrix *	build (const uint nthreads, const TBlockClusterTree *cluster, const matform_t matformat, const TTruncAcc &acc, TProgressBar *progress=NULL) const
	same as
virtual TMatrix *	build (const uint nthreads, const TBlockCluster *cluster, const matform_t matformat, const TTruncAcc &acc, TProgressBar *progress=NULL) const
	same as

Protected Attributes
const coeff_fn_t *	_coeff_fn
	function for computing matrix entries
const TLowRankApx *	_lr_apx
	low-rank approximation algorithm
bool	_recompress
	if true, use recompression for low-rank blocks
const bool	_cvt_to_dense
	if true, convert low-rank to dense if rank too high
stat_t *	_stat
	statistics object
Protected Attributes inherited from TMatBuilder
bool	_coarsening
	if true, coarsening is applied during construction
bool	_use_construct_acc
TTruncAcc	_coarse_acc
	defines coarsening accuracy

Additional Inherited Members
Protected Member Functions inherited from TMatBuilder
virtual TMatrix *	thr_build (const uint nthreads, const TBlockCluster *bc, const matform_t matformat, const TTruncAcc &acc, TProgressBar *progress) const
	threaded building process
virtual TBlockMatrix *	build_blocked (const TBlockCluster *bc) const
	build blocked matrix
virtual matform_t	matrix_format () const =0
	return matrix format

Constructor & Destructor Documentation

TDenseMBuilder	(	const coeff_fn_t *	coeff_fn,
		const TLowRankApx *	lr_apx,
		const bool	recompress = CFG::Arith::recompress,
		const bool	cvt_to_dense = CFG::Arith::convert_to_dense,
		stat_t *	stat = NULL
	)

Construct matrix construction object with given coefficient function and low-rank approximation object.