com.steema.teechart.functions
Class Variance

java.lang.Object
  com.steema.teechart.TeeBase
      com.steema.teechart.functions.Function
          com.steema.teechart.functions.Variance

All Implemented Interfaces:

java.io.Serializable

public class Variance
extends Function

Title: Variance class

Description: Variance function.

Example:

 function = new com.steema.teechart.functions.Variance();
 function.setChart(myChart.getChart());
 function.setPeriod(0); //all points

 Line functionSeries = new Line(myChart.getChart());
 functionSeries.setTitle("Variance");
 functionSeries.setDataSource(series);
 functionSeries.setVerticalAxis(VerticalAxis.RIGHT);
 functionSeries.setFunction(function);
 

Copyright (c) 2005-2008 by Steema Software SL. All Rights Reserved.

Company: Steema Software SL

See Also:

Serialized Form

Field Summary

Fields inherited from class com.steema.teechart.functions.Function

canUsePeriod, dPeriod, HideSourceList, noSourceRequired, series, SingleSource, updating

Fields inherited from class com.steema.teechart.TeeBase

chart

Constructor Summary

Variance()

Method Summary

double	calculate(Series s, int firstIndex, int lastIndex) Performs function operation on s series.
double	calculateMany(java.util.ArrayList sourceSeries, int valueIndex) Performs function operation on all sourceSeries series.
java.lang.String	getDescription() Gets descriptive text.

Methods inherited from class com.steema.teechart.functions.Function

addFunctionXY, addPoints, calculateAllPoints, calculateByPeriod, calculatePeriod, clear, doCalculation, getPeriod, getPeriodAlign, getPeriodStyle, getSeries, newInstance, readResolve, recalculate, setPeriod, setPeriodAlign, setPeriodStyle, setSeries, valueList

Methods inherited from class com.steema.teechart.TeeBase

getChart, invalidate, setBooleanProperty, setChart, setColorProperty, setDoubleProperty, setIntegerProperty, setStringProperty

Methods inherited from class java.lang.Object

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

Constructor Detail

Variance

public Variance()

Method Detail

calculate

public double calculate(Series s,
                        int firstIndex,
                        int lastIndex)

Performs function operation on s series.

Overrides:

calculate in class Function

Parameters:

s - Series

firstIndex - int

lastIndex - int

Returns:

double

calculateMany

public double calculateMany(java.util.ArrayList sourceSeries,
                            int valueIndex)

Performs function operation on all sourceSeries series.

Overrides:

calculateMany in class Function

Parameters:

sourceSeries - ArrayList

valueIndex - int

Returns:

double

getDescription

public java.lang.String getDescription()

Gets descriptive text.

Overrides:

getDescription in class Function

Returns:

String