RGauss2DFunctions.hh File Reference

#include "TMath.h"
#include "RBaseFunctions.hh"
#include "RMathConstants.hh"

Go to the source code of this file.

Functions
Double_t	RGaus2D_XYR (const Double_t x, const Double_t y, const Double_t Sx, const Double_t Sy, const Double_t Rho)
Double_t	RGaus2D_ABT (const Double_t x, const Double_t y, const Double_t Sa, const Double_t Sb, const Double_t Theta)
bool	REllipseABTtoXYR (const Double_t Sa, const Double_t Sb, const Double_t Theta, Double_t &Sx, Double_t &Sy, Double_t &Rho)
bool	REllipseXYRtoABT (const Double_t Sx, const Double_t Sy, const Double_t Rho, Double_t &Sa, Double_t &Sb, Double_t &Theta)

Detailed Description

Include file for 2D Gauss functions.

Function Documentation

Double_t RGaus2D_XYR	(	const Double_t	x,
		const Double_t	y,
		const Double_t	Sx,
		const Double_t	Sy,
		const Double_t	Rho
	)

2D Gauss function. Amplitude (maximum) is 1 and center at (0,0).

Parameters

x	point X coordinate
y	point Y coordinate
Sx	width along X axis
Sy	width along Y axis
Rho	correlation coefficient

Referenced by RFitGaus2DFunction().

Double_t RGaus2D_ABT	(	const Double_t	x,
		const Double_t	y,
		const Double_t	Sa,
		const Double_t	Sb,
		const Double_t	Theta
	)

2D Gauss function. Amplitude (maximum) is 1 and center at (0,0).

Parameters

x	point X coordinate
y	point Y coordinate
Sa	width along first principal axis
Sb	width along second principal axis
Theta	rotation angle of principal axis

References PI.

Referenced by RFitGaus2DFunction().

bool REllipseABTtoXYR	(	const Double_t	Sa,
		const Double_t	Sb,
		const Double_t	Theta,
		Double_t &	Sx,
		Double_t &	Sy,
		Double_t &	Rho
	)

Function converting parameters (Sa,Sb,theta) (width along principal axis and rotation angle) to (Sa,Sb,theta) (width along X and Y and correlation coefficient). The function returns true if calculation is possible.

Parameters

Sa	width along first principal axis
Sb	width along second principal axis
Theta	rotation angle of principal axis
Sx	width along X axis
Sy	width along Y axis
Rho	correlation coefficient

References PI.

Referenced by RGFitGaus2D::PointsToParamComponent(), and RGFitGaus2D::PointsToWidgetComponent().

bool REllipseXYRtoABT	(	const Double_t	Sx,
		const Double_t	Sy,
		const Double_t	Rho,
		Double_t &	Sa,
		Double_t &	Sb,
		Double_t &	Theta
	)

Function converting parameters (Sa,Sb,theta) (width along X and Y and correlation coefficient) to (Sa,Sb,theta) (width along principal axis and rotation angle). The function returns true if calculation is possible.

Parameters

Sx	width along X axis
Sy	width along Y axis
Rho	correlation coefficient
Sa	width along first principal axis
Sb	width along second principal axis
Theta	rotation angle of principal axis

References PI.

Referenced by RFitGaus2D::DrawEllipse(), RFitGaus2D::GetEllipse(), RFitGaus2D::GetTheta(), RGFitGaus2D::ParamToPointComponent(), and RGFitGaus2D::WidgetsToPointComponent().