A structure to hold linear fit statistics. More...

#include <Fit2D.h>

Collaboration diagram for Muon::Fit2D::LinStats:

Public Member Functions
	LinStats ()
	Constructor.
void	clear ()
	Clear the statistics before a new fit.
void	eval (double fX, double &fY, double &fYerr) const
	Evaluate a point along the fitted line.
std::string	toString () const
	Get a string representation of the fit parameters.

Public Attributes
int	n
	Number of points.
double	fIntercept
	Intercept of the fit line.
double	fSlope
	Slope of the fit line.
double	fCov [2][2]
	The parameter covariance matrix.
double	fChi2
	Chi-squared of the fit.

Detailed Description

A structure to hold linear fit statistics.

Definition at line 76 of file Fit2D.h.

Constructor & Destructor Documentation

◆ LinStats()

Muon::Fit2D::LinStats::LinStats ( )

inline

Constructor.

Definition at line 163 of file Fit2D.h.

                                   :
    n(0),
    fIntercept(0.0),
    fSlope(0.0),
    fChi2(0.0)
    {
        memset(fCov, 0, sizeof(fCov));
    }

Member Function Documentation

◆ clear()

void Muon::Fit2D::LinStats::clear ( )

inline

Clear the statistics before a new fit.

Definition at line 172 of file Fit2D.h.

    {
        n = 0;
        fIntercept = fSlope = fChi2 = 0.0;
        memset(fCov, 0, sizeof(fCov));
    }

◆ eval()

void Muon::Fit2D::LinStats::eval	(	double	fX,
		double &	fY,
		double &	fYerr ) const

Evaluate a point along the fitted line.

Parameters

fX	The X value of the point to project
fY	[output] The projected Y value
fYerr	[output] The error of the projected Y value

Definition at line 26 of file Fit2D.cxx.

{
    gsl_fit_linear_est(fX, fIntercept, fSlope, fCov[0][0], fCov[0][1], fCov[1][1], &fY, &fYerr);
}

◆ toString()

std::string Muon::Fit2D::LinStats::toString ( ) const

Get a string representation of the fit parameters.

Definition at line 31 of file Fit2D.cxx.

{
    std::ostringstream oss;
    oss << "Y=" << fIntercept << "+X*" << fSlope
    << ", N=" << n
    << ", Cov=[[" << fCov[0][0] << "," << fCov[0][1] << "],["
    << fCov[1][0] << "," << fCov[1][1] << "]]"
    << ", Chi2=" << fChi2;
 
    return oss.str();
}

Member Data Documentation

◆ fChi2

double Muon::Fit2D::LinStats::fChi2

Chi-squared of the fit.

Definition at line 82 of file Fit2D.h.

◆ fCov

double Muon::Fit2D::LinStats::fCov[2][2]

The parameter covariance matrix.

Definition at line 81 of file Fit2D.h.

◆ fIntercept

double Muon::Fit2D::LinStats::fIntercept

Intercept of the fit line.

Definition at line 79 of file Fit2D.h.

◆ fSlope

double Muon::Fit2D::LinStats::fSlope

Slope of the fit line.

Definition at line 80 of file Fit2D.h.

◆ n

int Muon::Fit2D::LinStats::n

Number of points.

Definition at line 78 of file Fit2D.h.

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

Public Member Functions

Public Attributes