org.eclipse.birt.chart.internal.model
Class FittingCalculator

java.lang.Object
  org.eclipse.birt.chart.internal.model.FittingCalculator

public class FittingCalculator

extends java.lang.Object

A utility class to calculate curve fitting points using the LOWESS algorithm.

Constructor Summary

FittingCalculator()
The constructor.

FittingCalculator(double[] xa, double[] ya, double windowProportion)
The constructor.

Method Summary

void	calculate(double[] xa, double[] ya, double windowProportion) Calculate the fitting points by given parameters.
double[]	getFittedValue() Returns the calculated fitted value.

Methods inherited from class java.lang.Object

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

Constructor Detail

FittingCalculator

public FittingCalculator()

The constructor.

FittingCalculator

public FittingCalculator(double[] xa,
                         double[] ya,
                         double windowProportion)

The constructor.

Parameters:

xa - x values.

ya - y valus.

windowProportion - window proportion for LOWESS algorithm.

Method Detail

getFittedValue

public double[] getFittedValue()

Returns the calculated fitted value.

Returns:

calculate

public void calculate(double[] xa,
                      double[] ya,
                      double windowProportion)

Calculate the fitting points by given parameters. This uses a LOWESS algorithm.

Parameters:

xa - x values.

ya - y valus.

windowProportion - window proportion for LOWESS algorithm.