Chi2 Class Reference

#include <Chi2.h>

Public Member Functions
	Chi2 (TMatrixD &, TMatrixD &, TMatrixD &)
double	getChi2 ()
TMatrixD &	getCovariance ()
int	getDOF ()
TMatrixD &	getSolution ()
	~Chi2 ()

Private Attributes
TMatrixD	covariance
int	dof
TMatrixD	leftMatrix
double	myChi2
TMatrixD	rightMatrix
TMatrixD	solution

Detailed Description

Chi2 calculation in survey data for drift tube chambers

Date

2007/04/13 18:05:35

Revision

1.1

Author

Pablo Martinez Ruiz del Arbol

Definition at line 15 of file Chi2.h.

Constructor & Destructor Documentation

Chi2::Chi2	(	TMatrixD &	m,
		TMatrixD &	ym,
		TMatrixD &	merrors
	)

Definition at line 3 of file Chi2.cc.

References covariance, dof, leftMatrix, funct::m, TtSemiLepEvtBuilder_cfi::mt, myChi2, rightMatrix, and solution.

                                                       {
  TMatrixD mt = m;
  mt.T();
  TMatrixD yt = ym;
  yt.T();
  TMatrixD m_leftMatrix(mt * merrors * m);
  TMatrixD m_rightMatrix(mt * merrors * ym);
  leftMatrix.ResizeTo(m_leftMatrix.GetNrows(), m_leftMatrix.GetNcols());
  rightMatrix.ResizeTo(m_rightMatrix.GetNrows(), m_rightMatrix.GetNcols());
  covariance.ResizeTo(m_leftMatrix.GetNrows(), m_leftMatrix.GetNrows());
  rightMatrix = m_rightMatrix;
  leftMatrix = m_leftMatrix;
  covariance = m_leftMatrix.Invert();
  TMatrixD m_solution(covariance * m_rightMatrix);
  solution.ResizeTo(m_solution.GetNrows(), m_solution.GetNcols());
  solution = m_solution;
  TMatrixD m_Chi2((yt - m_solution.T() * mt) * merrors * (ym - m * solution));
  myChi2 = m_Chi2(0, 0);
  dof = ym.GetNrows() - solution.GetNrows();
}

Chi2::~Chi2

(

)

Definition at line 24 of file Chi2.cc.

{}

Member Function Documentation

double Chi2::getChi2

(

)

Definition at line 28 of file Chi2.cc.

References myChi2.

{ return myChi2; }

TMatrixD & Chi2::getCovariance

(

)

Definition at line 26 of file Chi2.cc.

References covariance.

Referenced by DTSurveyChamber::compute().

{ return covariance; }

int Chi2::getDOF

(

)

Definition at line 29 of file Chi2.cc.

References dof.

{ return dof; }

TMatrixD & Chi2::getSolution

(

)

Definition at line 27 of file Chi2.cc.

References solution.

Referenced by DTSurveyChamber::compute().

{ return solution; }

Member Data Documentation

TMatrixD Chi2::covariance

private

Definition at line 28 of file Chi2.h.

Referenced by Chi2(), and getCovariance().

int Chi2::dof

private

Definition at line 27 of file Chi2.h.

Referenced by Chi2(), and getDOF().

TMatrixD Chi2::leftMatrix

private

Definition at line 29 of file Chi2.h.

Referenced by Chi2().

double Chi2::myChi2

private

Definition at line 26 of file Chi2.h.

Referenced by Chi2(), and getChi2().

TMatrixD Chi2::rightMatrix

private

Definition at line 30 of file Chi2.h.

Referenced by Chi2().

TMatrixD Chi2::solution

private

Definition at line 31 of file Chi2.h.

Referenced by Chi2(), and getSolution().