VSymMatrix Class Reference

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

#include <VMatrix.h>

Collaboration diagram for VSymMatrix:

Public Member Functions
	VSymMatrix (const unsigned int nRows=0)
void	resize (const unsigned int nRows)
	Resize symmetric matrix. More...
unsigned int	invert ()
	Matrix inversion. More...
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). More...
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.

Member Function Documentation

getNumRows()

unsigned int getNumRows

(

)

const

Get number of rows (= number of colums).

Returns

Number of rows.

Definition at line 184 of file VMatrix.cc.

invert()

unsigned int 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.

resize()

void resize

(

const unsigned int

nRows

)

Resize symmetric matrix.

Parameters

[in]

nRows

Number of rows.

Definition at line 175 of file VMatrix.cc.

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

• genfit2/code2/GBL/include/VMatrix.h
• genfit2/code2/GBL/src/VMatrix.cc