Package org.jlab.rec.cvt.fit

Class StraightTrackFitter

java.lang.Object

org.jlab.rec.cvt.fit.StraightTrackFitter

public class StraightTrackFitter
extends Object

A fitter which does sequential fit (for r, phi coordinates) to a circle using CircleFitter and then (for r, z coordinates) to a line using LineFitter. Uses CircleCalculator for corroboration of the results obtained from CircleCalculator

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	StraightTrackFitter.FitStatus	Status of the HelicalTrackFit

Constructor Summary

Constructors

Constructor	Description
StraightTrackFitter()

Method Summary

Modifier and Type	Method	Description
StraightTrackFitter.FitStatus	fit(List<Double> X, List<Double> Y, List<Double> Z, List<Double> Rho, List<Double> errRt, List<Double> errRho, List<Double> ErrZ)
double[]	getChi2()
HelicalTrackFitPars	getFit()	Return the results of the most recent helix fit.
Helix	getHelix()
LineFitPars	getLineFit()	Return the s-z line fit for the most recent helix fit.
double	getXb()
double	getYb()
void	setCovMat(double[] chisq)
void	setHelix(Helix helix)
void	setXb(double Xb)
void	setYb(double Yb)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

StraightTrackFitter

public StraightTrackFitter()

Method Details

fit

public StraightTrackFitter.FitStatus fit(List<Double> X,
 List<Double> Y,
 List<Double> Z,
 List<Double> Rho,
 List<Double> errRt,
 List<Double> errRho,
 List<Double> ErrZ)

getFit

public HelicalTrackFitPars getFit()

Return the results of the most recent helix fit. Returns null if the fit was not successful.

Returns:

HelicalTrackFitPars from the most recent helix fit

getLineFit

public LineFitPars getLineFit()

Return the s-z line fit for the most recent helix fit. If the line fit failed or was not performed due to not having enough 3D hits, null is returned.

Returns:

line fit for most recent helix fit

getHelix

public Helix getHelix()

setHelix

public void setHelix(Helix helix)

getChi2

public double[] getChi2()

setCovMat

public void setCovMat(double[] chisq)

getXb

public double getXb()

Returns:

the Xb

setXb

public void setXb(double Xb)

Parameters:

Xb - the Xb to set

getYb

public double getYb()

Returns:

the Yb

setYb

public void setYb(double Yb)

Parameters:

Yb - the Yb to set