org.jscience.mathematics.analysis.fitting
Class AbstractCurveFitter.FitMeasurement

java.lang.Object
  org.jscience.mathematics.analysis.estimation.WeightedMeasurement
      org.jscience.mathematics.analysis.fitting.AbstractCurveFitter.FitMeasurement

Enclosing class:

AbstractCurveFitter

public class AbstractCurveFitter.FitMeasurement
extends WeightedMeasurement

This class represents the fit measurements. One measurement is a weighted pair (x, y), where y = f (x) is the value of the function at x abscissa. This class is an inner class because the methods related to the computation of f values and derivative are proveded by the fitter implementations.

Field Summary

double

x Abscissa of the measurement.

Constructor Summary

AbstractCurveFitter.FitMeasurement(double weight, double x, double y)
Simple constructor.

Method Summary

double	getPartial(EstimatedParameter p) Partial derivative with respect to one function coefficient.
double	getTheoreticalValue() Get the value of the fitted function at x.

Methods inherited from class org.jscience.mathematics.analysis.estimation.WeightedMeasurement

getMeasuredValue, getResidual, getWeight, isIgnored, setIgnored

Methods inherited from class java.lang.Object

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

Field Detail

x

public final double x

Abscissa of the measurement.

Constructor Detail

AbstractCurveFitter.FitMeasurement

public AbstractCurveFitter.FitMeasurement(double weight,
                                          double x,
                                          double y)

Simple constructor.

Parameters:

weight - weight of the measurement in the fitting process

x - abscissa of the measurement

y - ordinate of the measurement

Method Detail

getTheoreticalValue

public double getTheoreticalValue()

Get the value of the fitted function at x.

Specified by:

getTheoreticalValue in class WeightedMeasurement

Returns:

theoretical value at the measurement abscissa

getPartial

public double getPartial(EstimatedParameter p)

Partial derivative with respect to one function coefficient.

Specified by:

getPartial in class WeightedMeasurement

Parameters:

p - parameter with respect to which the derivative is requested

Returns:

partial derivative