de.gsi.chart.renderer.datareduction

Class MaxDataReducer

java.lang.Object

de.gsi.chart.renderer.datareduction.MaxDataReducer

All Implemented Interfaces:

RendererDataReducer

public class MaxDataReducer
extends Object
implements RendererDataReducer

-- essentially a down-sampling data reduction algorithm

Author:

braeun

Constructor Summary

Constructors

Constructor and Description
MaxDataReducer()

Method Summary

Modifier and Type

Method and Description

int

reducePoints(double[] xValues, double[] yValues, double[] xPointErrorsPos, double[] xPointErrorsNeg, double[] yPointErrorsPos, double[] yPointErrorsNeg, String[] styles, boolean[] pointSelected, int indexMin, int indexMax) Internal function to the ErrorDataSetRenderer arrays are cached copies and operations are assumed to be performed in-place (<-> for performance reasons/minimisation of memory allocation)

Methods inherited from class java.lang.Object

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

Constructor Detail

MaxDataReducer

public MaxDataReducer()

Method Detail

reducePoints

public int reducePoints(double[] xValues,
                        double[] yValues,
                        double[] xPointErrorsPos,
                        double[] xPointErrorsNeg,
                        double[] yPointErrorsPos,
                        double[] yPointErrorsNeg,
                        String[] styles,
                        boolean[] pointSelected,
                        int indexMin,
                        int indexMax)

Description copied from interface: RendererDataReducer

Internal function to the ErrorDataSetRenderer arrays are cached copies and operations are assumed to be performed in-place (<-> for performance reasons/minimisation of memory allocation)

Specified by:

reducePoints in interface RendererDataReducer

Parameters:

xValues - array of x coordinates

yValues - array of y coordinates

xPointErrorsPos - array of coordinates containing x+exp

xPointErrorsNeg - array of coordinates containing x-exn

yPointErrorsPos - array of coordinates containing x+eyp

yPointErrorsNeg - array of coordinates containing x+eyn

styles - point styles

pointSelected - array containing the points that have been specially selected by the user

indexMin - minimum index of those array that shall be considered

indexMax - maximum index of those array that shall be considered

Returns:

effective number of points that remain after the reduction