com.jrefinery.data
Interface XYDataset

All Superinterfaces:

Dataset, SeriesDataset

All Known Subinterfaces:

HighLowDataset, IntervalXYDataset, IntervalXYZDataset, SignalsDataset, WindDataset, XYZDataset

All Known Implementing Classes:

CombinedDataset, CombinedXYDataset, CompassDataset, CTDXYDataset, DefaultHighLowDataset, DefaultWindDataset, DefaultXYDataset, EnvXYDataset, JdbcXYDataset, com.jrefinery.chart.demo.SampleXYDataset, SiamCompassDataset, SiamXYDataset, SubSeriesDataset, TimeSeriesCollection, XYSeriesCollection

public interface XYDataset
extends SeriesDataset

An interface through which data in the form of (x, y) pairs can be accessed.

JFreeChart (http://www.jrefinery.com/jfreechart) uses this interface to obtain (x, y) data for plotting charts.

Method Summary

int	getItemCount(int series) Returns the number of items in a series.
java.lang.Number	getXValue(int series, int item) Returns the x-value for an item within a series.
java.lang.Number	getYValue(int series, int item) Returns the y-value for an item within a series.

Methods inherited from interface com.jrefinery.data.SeriesDataset

getSeriesCount, getSeriesName

Methods inherited from interface com.jrefinery.data.Dataset

addChangeListener, removeChangeListener

Method Detail

getItemCount

int getItemCount(int series)

Returns the number of items in a series.

Parameters:

series - The series (zero-based index).

Returns:

The number of items within a series.

getXValue

java.lang.Number getXValue(int series,
                           int item)

Returns the x-value for an item within a series.

The implementation is responsible for ensuring that the x-values are presented in ascending order.

Parameters:

series - The series (zero-based index).

item - The item (zero-based index).

Returns:

The x-value for an item within a series.

getYValue

java.lang.Number getYValue(int series,
                           int item)

Returns the y-value for an item within a series.

Parameters:

series - The series (zero-based index).

item - The item (zero-based index).

Returns:

The y-value for an item within a series.