CbmLitFieldFitter Class Reference

Implementation of the polynomial field approximation. More...

#include <CbmLitFieldFitter.h>

Collaboration diagram for CbmLitFieldFitter:

Public Member Functions
	CbmLitFieldFitter (unsigned int polynomDegree)
	Constructor.
virtual	~CbmLitFieldFitter ()
	Destructor.
template<class T >
void	FitSlice (float Z, lit::parallel::LitFieldSlice< T > &slice)
	Fits (X, Y) slice of the magnetic field at Z position.
void	FitSliceScal (float Z, lit::parallel::LitFieldSlice< fscal > &slice)
	FitSlice implementation using fscal data type.
void	FitSliceVec (float Z, lit::parallel::LitFieldSlice< fvec > &slice)
	FitSlice implementation using fvec data type.
void	SetXangle (double xangle)
void	SetYangle (double yangle)
void	SetNofBinsX (int nofBinsX)
void	SetNofBinsY (int nofBinsY)
void	SetUseEllipseAcc (bool useEllipseAcc)

Private Member Functions
void	FitSlice (double Z, std::vector< double > &parBx, std::vector< double > &parBy, std::vector< double > &parBz)
	Fit (X, Y) slice of magnetic field at Z position.
void	FitSlice (const std::vector< double > &x, const std::vector< double > &y, const std::vector< double > &z, std::vector< double > &par)
	Fit (X, Y) slice of magnetic field.
void	FitSliceMy (double Z, std::vector< double > &parBx, std::vector< double > &parBy, std::vector< double > &parBz)
	Fit (X, Y) slice of the magnetic field at Z position.
const CbmLitPolynom *	GetPolynom () const
	Return polynomial which is used for approximation.

Private Attributes
FairField *	fField
double	fXangle
double	fYangle
int	fNofBinsX
int	fNofBinsY
bool	fUseEllipseAcc
unsigned int	fPolynomDegree
CbmLitPolynom *	fPolynom

Detailed Description

Implementation of the polynomial field approximation.

Class performs approximation of magnetic field using 0-9 degree polynomial. MINUIT is used for minimization. Also custom LSM fit is implemented for comparison.

Author

Andrey Lebedev andre.nosp@m.y.le.nosp@m.bedev.nosp@m.@gsi.nosp@m..de

Date

2009

Definition at line 65 of file CbmLitFieldFitter.h.

Constructor & Destructor Documentation

CbmLitFieldFitter()

CbmLitFieldFitter::CbmLitFieldFitter

(

unsigned int

polynomDegree

)

Constructor.

Parameters

[in]

polynomDegree

Polynomial degree to be used for field approximation.

Definition at line 777 of file CbmLitFieldFitter.cxx.

References fField, and fPolynom.

~CbmLitFieldFitter()

CbmLitFieldFitter::~CbmLitFieldFitter ( )

virtual

Destructor.

Definition at line 802 of file CbmLitFieldFitter.cxx.

Member Function Documentation

FitSlice() [1/3]

void CbmLitFieldFitter::FitSlice ( const std::vector< double > &  x, const std::vector< double > &  y, const std::vector< double > &  z, std::vector< double > &  par  )

private

Fit (X, Y) slice of magnetic field.

Parameters

[in]	x	Vector with X coordinates.
[in]	y	Vector with y coordinates.
[in]	z	Vector with field values.
[out]	par	Output vector with polynomial coefficients.

Definition at line 855 of file CbmLitFieldFitter.cxx.

References fPolynom, CbmLitPolynom::GetNofCoefficients(), FCNPolynom::GetPolynom(), x, and y.

FitSlice() [2/3]

void CbmLitFieldFitter::FitSlice ( double  Z, std::vector< double > &  parBx, std::vector< double > &  parBy, std::vector< double > &  parBz  )

private

Fit (X, Y) slice of magnetic field at Z position.

Parameters

[in]	Z	Z position of the slice.
[out]	parBx	Output vector with polynomial coefficients for Bx.
[out]	parBy	Output vector with polynomial coefficients for By.
[out]	parBz	Output vector with polynomial coefficients for Bz.

Definition at line 808 of file CbmLitFieldFitter.cxx.

References fField, FitSlice(), fNofBinsX, fNofBinsY, fUseEllipseAcc, fXangle, fYangle, pos, x, and y.

FitSlice() [3/3]

template<class T >

void CbmLitFieldFitter::FitSlice ( float  Z, lit::parallel::LitFieldSlice< T > &  slice  )

inline

Fits (X, Y) slice of the magnetic field at Z position.

Parameters

[in]	Z	Z position of the slice.
[out]	slice	Output approximated field slice.

Definition at line 84 of file CbmLitFieldFitter.h.

References FitSlice(), lit::parallel::LitFieldSlice< T >::SetCoefficients(), and lit::parallel::LitFieldSlice< T >::SetZ().

Referenced by FitSlice(), and FitSlice().

FitSliceMy()

void CbmLitFieldFitter::FitSliceMy ( double  Z, std::vector< double > &  parBx, std::vector< double > &  parBy, std::vector< double > &  parBz  )

private

Fit (X, Y) slice of the magnetic field at Z position.

Parameters

[in]	Z	Z position of the slice.
[out]	parBx	Output vector with polynomial coefficients for Bx.
[out]	parBy	Output vector with polynomial coefficients for By.
[out]	parBz	Output vector with polynomial coefficients for Bz.

Definition at line 885 of file CbmLitFieldFitter.cxx.

References fPolynomDegree, fXangle, fYangle, x, and y.

FitSliceScal()

void CbmLitFieldFitter::FitSliceScal	(	float	Z,
		lit::parallel::LitFieldSlice< fscal > &	slice
	)

FitSlice implementation using fscal data type.

Definition at line 804 of file CbmLitFieldFitter.cxx.

FitSliceVec()

void CbmLitFieldFitter::FitSliceVec	(	float	Z,
		lit::parallel::LitFieldSlice< fvec > &	slice
	)

FitSlice implementation using fvec data type.

Definition at line 806 of file CbmLitFieldFitter.cxx.

GetPolynom()

const CbmLitPolynom * CbmLitFieldFitter::GetPolynom ( ) const

inlineprivate

Return polynomial which is used for approximation.

Returns

Polynomial which is used for approximation.

Definition at line 148 of file CbmLitFieldFitter.h.

References fPolynom.

SetNofBinsX()

void CbmLitFieldFitter::SetNofBinsX ( int  nofBinsX )

inline

Definition at line 111 of file CbmLitFieldFitter.h.

References fNofBinsX.

SetNofBinsY()

void CbmLitFieldFitter::SetNofBinsY ( int  nofBinsY )

inline

Definition at line 112 of file CbmLitFieldFitter.h.

References fNofBinsY.

SetUseEllipseAcc()

void CbmLitFieldFitter::SetUseEllipseAcc ( bool  useEllipseAcc )

inline

Definition at line 113 of file CbmLitFieldFitter.h.

References fUseEllipseAcc.

SetXangle()

void CbmLitFieldFitter::SetXangle ( double  xangle )

inline

Definition at line 109 of file CbmLitFieldFitter.h.

References fXangle.

SetYangle()

void CbmLitFieldFitter::SetYangle ( double  yangle )

inline

Definition at line 110 of file CbmLitFieldFitter.h.

References fYangle.

Member Data Documentation

fField

FairField* CbmLitFieldFitter::fField

private

Definition at line 151 of file CbmLitFieldFitter.h.

Referenced by CbmLitFieldFitter(), and FitSlice().

fNofBinsX

int CbmLitFieldFitter::fNofBinsX

private

Definition at line 156 of file CbmLitFieldFitter.h.

Referenced by FitSlice(), and SetNofBinsX().

fNofBinsY

int CbmLitFieldFitter::fNofBinsY

private

Definition at line 157 of file CbmLitFieldFitter.h.

Referenced by FitSlice(), and SetNofBinsY().

fPolynom

CbmLitPolynom* CbmLitFieldFitter::fPolynom

private

Definition at line 162 of file CbmLitFieldFitter.h.

Referenced by CbmLitFieldFitter(), FitSlice(), and GetPolynom().

fPolynomDegree

unsigned int CbmLitFieldFitter::fPolynomDegree

private

Definition at line 161 of file CbmLitFieldFitter.h.

Referenced by FitSliceMy().

fUseEllipseAcc

bool CbmLitFieldFitter::fUseEllipseAcc

private

Definition at line 159 of file CbmLitFieldFitter.h.

Referenced by FitSlice(), and SetUseEllipseAcc().

fXangle

double CbmLitFieldFitter::fXangle

private

Definition at line 153 of file CbmLitFieldFitter.h.

Referenced by FitSlice(), FitSliceMy(), and SetXangle().

fYangle

double CbmLitFieldFitter::fYangle

private

Definition at line 154 of file CbmLitFieldFitter.h.

Referenced by FitSlice(), FitSliceMy(), and SetYangle().

---

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

• CbmLitFieldFitter.h
• CbmLitFieldFitter.cxx