org.jfree.data.time

Class MovingAverage

public class MovingAverage extends Object

A utility class for calculating moving averages of time series data.
Method Summary
static TimeSeriesCollectioncreateMovingAverage(TimeSeriesCollection source, String suffix, int periodCount, int skip)
Creates a new TimeSeriesCollection containing a moving average series for each series in the source collection.
static TimeSeriescreateMovingAverage(TimeSeries source, String name, int periodCount, int skip)
Creates a new TimeSeries containing moving average values for the given series.
static XYDatasetcreateMovingAverage(XYDataset source, String suffix, long period, long skip)
Creates a new XYDataset containing the moving averages of each series in the source dataset.
static XYDatasetcreateMovingAverage(XYDataset source, String suffix, double period, double skip)
Creates a new XYDataset containing the moving averages of each series in the source dataset.
static XYSeriescreateMovingAverage(XYDataset source, int series, String name, double period, double skip)
Creates a new XYSeries containing the moving averages of one series in the source dataset.
static TimeSeriescreatePointMovingAverage(TimeSeries source, String name, int pointCount)
Creates a new TimeSeries containing moving average values for the given series, calculated by number of points (irrespective of the 'age' of those points).

Method Detail

createMovingAverage

public static TimeSeriesCollection createMovingAverage(TimeSeriesCollection source, String suffix, int periodCount, int skip)
Creates a new TimeSeriesCollection containing a moving average series for each series in the source collection.

Parameters: source the source collection. suffix the suffix added to each source series name to create the corresponding moving average series name. periodCount the number of periods in the moving average calculation. skip the number of initial periods to skip.

Returns: A collection of moving average time series.

createMovingAverage

public static TimeSeries createMovingAverage(TimeSeries source, String name, int periodCount, int skip)
Creates a new TimeSeries containing moving average values for the given series. If the series is empty (contains zero items), the result is an empty series.

Parameters: source the source series. name the name of the new series. periodCount the number of periods used in the average calculation. skip the number of initial periods to skip.

Returns: The moving average series.

createMovingAverage

public static XYDataset createMovingAverage(XYDataset source, String suffix, long period, long skip)
Creates a new XYDataset containing the moving averages of each series in the source dataset.

Parameters: source the source dataset. suffix the string to append to source series names to create target series names. period the averaging period. skip the length of the initial skip period.

Returns: The dataset.

createMovingAverage

public static XYDataset createMovingAverage(XYDataset source, String suffix, double period, double skip)
Creates a new XYDataset containing the moving averages of each series in the source dataset.

Parameters: source the source dataset. suffix the string to append to source series names to create target series names. period the averaging period. skip the length of the initial skip period.

Returns: The dataset.

createMovingAverage

public static XYSeries createMovingAverage(XYDataset source, int series, String name, double period, double skip)
Creates a new XYSeries containing the moving averages of one series in the source dataset.

Parameters: source the source dataset. series the series index (zero based). name the name for the new series. period the averaging period. skip the length of the initial skip period.

Returns: The dataset.

createPointMovingAverage

public static TimeSeries createPointMovingAverage(TimeSeries source, String name, int pointCount)
Creates a new TimeSeries containing moving average values for the given series, calculated by number of points (irrespective of the 'age' of those points). If the series is empty (contains zero items), the result is an empty series.

Developed by Benoit Xhenseval (www.ObjectLab.co.uk).

Parameters: source the source series. name the name of the new series. pointCount the number of POINTS used in the average calculation (not periods!)

Returns: The moving average series.

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