org.lcsim.fit.line

Class SlopeInterceptLineFitter

java.lang.Object

org.lcsim.fit.line.SlopeInterceptLineFitter

public class SlopeInterceptLineFitter
extends Object

A least-squares fit to a 2-D line in slope-intercept form y=a+bx. It assumes that there is no error on the x-component and that all the error can be projected onto the y-component.

Author:

Norman Graf

Field Summary

Fields

Modifier and Type	Field and Description
private SlopeInterceptLineFit	_fit

Constructor Summary

Constructors

Constructor and Description
SlopeInterceptLineFitter() Creates a new instance of SlopeInterceptLineFitter

Method Summary

Methods

Modifier and Type	Method and Description
boolean	fit(double[] x, double[] y, double[] sigma_y, int n) Perform the fit.
SlopeInterceptLineFit	getFit() Return the fit.

Methods inherited from class java.lang.Object

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

Field Detail

_fit

private SlopeInterceptLineFit _fit

Constructor Detail

SlopeInterceptLineFitter

public SlopeInterceptLineFitter()

Creates a new instance of SlopeInterceptLineFitter

Method Detail

fit

public boolean fit(double[] x,
          double[] y,
          double[] sigma_y,
          int n)

Perform the fit.

Parameters:

x - The array of independent variables.

y - The array of dependent variables.

sigma_y - The array of uncertainties on the dependent variables.

n - The number of points to fit

Returns:

true if the fit is successful.

getFit

public SlopeInterceptLineFit getFit()

Return the fit.

Returns:

The fit results. Returns null if the fit is not successful.