gbl::VSymMatrix Class Reference

Simple symmetric Matrix based on std::vector<double> More...

#include <GenFit/blob/master/GBL/include/VMatrix.h>

Collaboration diagram for gbl::VSymMatrix:

Public Member Functions
	VSymMatrix (const unsigned int nRows=0)
virtual	~VSymMatrix ()
void	resize (const unsigned int nRows)
	Resize symmetric matrix.
unsigned int	invert ()
	Matrix inversion.
double &	operator() (unsigned int i, unsigned int j)
	access element (i,j) assuming i>=j
double	operator() (unsigned int i, unsigned int j) const
	access element (i,j) assuming i>=j
unsigned int	getNumRows () const
	Get number of rows (= number of colums).
void	print () const
	Print matrix.
VSymMatrix	operator- (const VMatrix &aMatrix) const
	Subtraction SymMatrix-(sym)Matrix.
VVector	operator* (const VVector &aVector) const
	Multiplication SymMatrix*Vector.
VMatrix	operator* (const VMatrix &aMatrix) const
	Multiplication SymMatrix*Matrix.

Private Attributes
unsigned int	numRows
	Number of rows.
std::vector< double >	theVec
	Data (symmetric storage)

Detailed Description

Simple symmetric Matrix based on std::vector<double>

Definition at line 86 of file VMatrix.h.

View newest version in sPHENIX GitHub at line 86 of file VMatrix.h

Constructor & Destructor Documentation

gbl::VSymMatrix::VSymMatrix

(

const unsigned int

nRows = 0

)

Definition at line 164 of file VMatrix.cc.

View newest version in sPHENIX GitHub at line 164 of file VMatrix.cc

gbl::VSymMatrix::~VSymMatrix ( )

virtual

Definition at line 168 of file VMatrix.cc.

View newest version in sPHENIX GitHub at line 168 of file VMatrix.cc

Member Function Documentation

unsigned int gbl::VSymMatrix::getNumRows

(

)

const

Get number of rows (= number of colums).

Returns

Number of rows.

Definition at line 184 of file VMatrix.cc.

View newest version in sPHENIX GitHub at line 184 of file VMatrix.cc

References numRows.

unsigned int gbl::VSymMatrix::invert

(

)

Matrix inversion.

Invert symmetric N-by-N matrix V in symmetric storage mode V(1) = V11, V(2) = V12, V(3) = V22, V(4) = V13, . . . replaced by inverse matrix

Method of solution is by elimination selecting the pivot on the diagonal each stage. The rank of the matrix is returned in NRANK. For NRANK ne N, all remaining rows and cols of the resulting matrix V are set to zero.

Exceptions

1	: matrix is singular.

Returns

Rank of matrix.

Definition at line 348 of file VMatrix.cc.

View newest version in sPHENIX GitHub at line 348 of file VMatrix.cc

References eps, i, j, k, Acts::UnitConstants::m, n, next, numRows, and theVec.

Referenced by gbl::BorderedBandMatrix::solveAndInvertBorderedBand().

Here is the caller graph for this function:

double & gbl::VSymMatrix::operator() ( unsigned int  i, unsigned int  j  )

inline

access element (i,j) assuming i>=j

Definition at line 125 of file VMatrix.h.

View newest version in sPHENIX GitHub at line 125 of file VMatrix.h

References theVec.

double gbl::VSymMatrix::operator() ( unsigned int  i, unsigned int  j  ) const

inline

access element (i,j) assuming i>=j

Definition at line 130 of file VMatrix.h.

View newest version in sPHENIX GitHub at line 130 of file VMatrix.h

References theVec.

VVector gbl::VSymMatrix::operator*

(

const VVector &

aVector

)

const

Multiplication SymMatrix*Vector.

Definition at line 216 of file VMatrix.cc.

View newest version in sPHENIX GitHub at line 216 of file VMatrix.cc

References i, j, numRows, and theVec.

VMatrix gbl::VSymMatrix::operator*

(

const VMatrix &

aMatrix

)

const

Multiplication SymMatrix*Matrix.

Definition at line 229 of file VMatrix.cc.

View newest version in sPHENIX GitHub at line 229 of file VMatrix.cc

References gbl::VMatrix::getNumCols(), i, j, numRows, and theVec.

Here is the call graph for this function:

VSymMatrix gbl::VSymMatrix::operator-

(

const VMatrix &

aMatrix

)

const

Subtraction SymMatrix-(sym)Matrix.

Definition at line 205 of file VMatrix.cc.

View newest version in sPHENIX GitHub at line 205 of file VMatrix.cc

References i, j, numRows, and theVec.

void gbl::VSymMatrix::print

(

)

const

Print matrix.

Definition at line 189 of file VMatrix.cc.

View newest version in sPHENIX GitHub at line 189 of file VMatrix.cc

References i, j, Acts::UnitConstants::min, numRows, and theVec.

Referenced by gbl::BorderedBandMatrix::printMatrix().

Here is the caller graph for this function:

void gbl::VSymMatrix::resize

(

const unsigned int

nRows

)

Resize symmetric matrix.

Parameters

[in]

nRows

Number of rows.

Definition at line 175 of file VMatrix.cc.

View newest version in sPHENIX GitHub at line 175 of file VMatrix.cc

References numRows, and theVec.

Referenced by gbl::BorderedBandMatrix::resize().

Here is the caller graph for this function:

Member Data Documentation

unsigned int gbl::VSymMatrix::numRows

private

Number of rows.

Definition at line 100 of file VMatrix.h.

View newest version in sPHENIX GitHub at line 100 of file VMatrix.h

Referenced by getNumRows(), invert(), operator*(), operator-(), print(), and resize().

std::vector<double> gbl::VSymMatrix::theVec

private

Data (symmetric storage)

Definition at line 101 of file VMatrix.h.

View newest version in sPHENIX GitHub at line 101 of file VMatrix.h

Referenced by invert(), operator()(), operator*(), operator-(), print(), and resize().

---

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

• GenFit/blob/master/GBL/include/VMatrix.h
• GenFit/blob/master/GBL/src/VMatrix.cc