create a chart with not-fixed length of time fragments and .

[Helen Lin]

I am evaluating the JFreeChart(never used JFreeChart before). I would like to create a chart while the x-axis with values(3month, 6 months, 1 year, 2 year, 5 year, 10 year and 30 year) and there will at least two sets of values(say yield for US, for Canada and...) for the y-axis.

Is this feasible? How should I do it? Do you have any sample code?

Thanks for the help in advance.


my e-mail address: helen.lin@tdsecurities.com

[uls]

is no big deal ... in fact it's very straightforward:

Code: Select all

	JFreeChart chart;
	//JFreeChart datasets
	public TimeSeriesCollection xyseries=new TimeSeriesCollection(); // XYSeriesCollection (see ttp://www.jfree.org/jfreechart/javadoc/org/jfree/data/XYSeriesCollection.html)
	TimeSeries x1;
	TimeSeries bollinger_top;
	TimeSeries bollinger_bottom;
	
	TimeSeries average1;
	TimeSeries average2;
	ChartPanel chartPanel;

//-........ 

	x1=new TimeSeries("symbol", FixedMillisecond.class);
		average1=new TimeSeries("av1", FixedMillisecond.class);
		xyseries.addSeries(x1);
		xyseries.addSeries(average1);
		System.out.println("Populated.");
		//
		JFreeChart chart = createChart(xyseries);
		System.out.println("constr.");		
		chart.getXYPlot().setOrientation(PlotOrientation.VERTICAL);
		chart.setAntiAlias(false);
		chart.setBackgroundPaint(new Color(255,255,255));
		
		chartPanel = new ChartPanel(chart);
		chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));


//...............
public void calcAverage1(int d, Date timestamp){	
		try{
			double v=0;
			
			List l1=x1.getItems();
			
			for(int i=d;i<d+av1;i++){
				v+=x1.getValue(x1.getItemCount()-(av1-i)).doubleValue();
				
			}
			average1.add(new FixedMillisecond(timestamp), v/av1);

			
		}
		catch(Exception e){
			//e.printStackTrace();
			//System.out.println(timestamp.toString());
		}
	}


	

i hope this helps ...

regards[/code]