Package cnuphys.splot.fit

Class GaussianFit

java.lang.Object

com.nr.model.Fitmrq

cnuphys.splot.fit.GaussianFit

All Implemented Interfaces:

IValueGetter

public class GaussianFit
extends com.nr.model.Fitmrq
implements IValueGetter

For fitting a sum of Gaussians to a curve (DataColumn)

Author:

heddle

Field Summary

Fields inherited from class com.nr.model.Fitmrq

a, alpha, chisq, covar, ia

Constructor Summary

Constructors

Constructor	Description
GaussianFit(Fit fit)	Create a Gaussian Fit

Method Summary

Modifier and Type	Method	Description
double	getChiSquare()	Get the chi square of the fit
double[][]	getCovarianceMatrix()	Get the covariance matrix
double[]	getFitParameters()	Get the fit parameters
static double[]	initialGuess(Fit fit)	A method to generate an initial guess
static double[]	secondaryInitialGuess(Fit fit)	A method to generate an initial guess
double	value(double x)

Methods inherited from class com.nr.model.Fitmrq

covsrt, fit, free, hold, mrqcof

Methods inherited from class java.lang.Object

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

Constructor Details

GaussianFit

public GaussianFit(Fit fit)
            throws IllegalArgumentException

Create a Gaussian Fit

Parameters:

fit - the fit data

tolerance - the tolerance

Throws:

IllegalArgumentException

Method Details

initialGuess

public static double[] initialGuess(Fit fit)

A method to generate an initial guess

Parameters:

xx - the x data

yy - the y data

numGauss - the number of gaussians

Returns:

secondaryInitialGuess

public static double[] secondaryInitialGuess(Fit fit)

A method to generate an initial guess

Parameters:

xx - the x data

yy - the y data

numGauss - the number of gaussians

Returns:

getFitParameters

public double[] getFitParameters()

Get the fit parameters

Returns:

the fit parameters

getCovarianceMatrix

public double[][] getCovarianceMatrix()

Get the covariance matrix

Returns:

the covariance matrix

getChiSquare

public double getChiSquare()

Get the chi square of the fit

Returns:

the chi square

value

public double value(double x)

Specified by:

value in interface IValueGetter