CombinedPlot and CategoryAxis

[Michal Polak]

Hello,

I hope I have an elementary question.

I want to create an combined chart with Income and Expense series.
Vertical axis means money.
Horizontal axis means weeks.
I have no problem with it, I even have a balance chart (ChartFactory.createCombinableTimeSeriesChart) in it - see source below.

Well, finally my question: Is it possible to have a CategoryAxis as Horizontal axis (City - Incomes and Expenses on cities) ?

This source:
CategoryAxis cityAxis = new HorizontalCategoryAxis("City");
NumberAxis valueAxis = new VerticalNumberAxis("Finance");
CombinedPlot overlaidPlot = new CombinedPlot(cityAxis, valueAxis);

does not work, I receive:
com.jrefinery.chart.PlotNotCompatibleException: Axis.setPlot(...): plot not compatible with axis.

Well, maybe I am totally wrong so I have better question:

How should I create a chart [

Vertical axis means money.
Horizontal axis means cities (an enumeration)
Income and Expense series]

in one picture ?

Thank you.
Michal.

import java.awt.*;
import com.jrefinery.chart.*;
import com.jrefinery.ui.*;
import com.jrefinery.data.*;
import com.jrefinery.chart.combination.*;

public class TestGraph3 extends ApplicationFrame {

public static void main(String[] args) {

TestGraph3 demo = new TestGraph3();
demo.pack();
demo.setVisible(true);
}

public TestGraph3() {

JFreeChart chart = createCombinedChart();
JFreeChartPanel panel = new JFreeChartPanel(chart, true, true, true, false, true);
this.setContentPane(panel);
}

private JFreeChart createCombinedChart() {

double[] incomeData = new double[] {3.75, 2, 1.78, 0.3};
double[] expenseData = new double[] {1, 3.56, 0, 2.3};
BasicTimeSeries incomeSerie = new BasicTimeSeries("Income", Week.class);
BasicTimeSeries expenseSerie = new BasicTimeSeries("Expense", Week.class);
BasicTimeSeries balanceSerie = new BasicTimeSeries("Balance", Week.class);
double previous = 0;
for (int i = 0; i < 4; i++) {

incomeSerie.add(new Week(i, 2002), new Double(incomeData));
expenseSerie.add(new Week(i, 2002), new Double(-expenseData));
previous += incomeData - expenseData;
balanceSerie.add(new Week(i, 2002), new Double(previous));
}

CombinedDataset dataset = new CombinedDataset();
dataset.add(new TimeSeriesCollection(incomeSerie));
dataset.add(new TimeSeriesCollection(expenseSerie));
dataset.add(new TimeSeriesCollection(balanceSerie));

ValueAxis timeAxis = new HorizontalDateAxis("Date");
timeAxis.setCrosshairVisible(false);
NumberAxis valueAxis = new VerticalNumberAxis("Finance");

CombinedPlot overlaidPlot = new CombinedPlot(timeAxis, valueAxis);
XYPlot plot0 = new XYPlot(timeAxis, valueAxis, new VerticalXYBarRenderer(0.20));
SeriesDataset s0 = new SubSeriesDataset(dataset, 0);
CombinedChart c0 = ChartFactory.createCombinableChart(s0, plot0);
overlaidPlot.add(c0);

XYPlot plot1 = new XYPlot(timeAxis, valueAxis, new VerticalXYBarRenderer(0.20));
SeriesDataset s1 = new SubSeriesDataset(dataset, 1);
CombinedChart c1 = ChartFactory.createCombinableChart(s1, plot1);
overlaidPlot.add(c1);

SeriesDataset s2 = new SubSeriesDataset(dataset, 2);
CombinedChart c2 = ChartFactory.createCombinableTimeSeriesChart(timeAxis, valueAxis, s2);
overlaidPlot.add(c2);

overlaidPlot.setSeriesPaint(new Paint[] { Color.blue, Color.magenta, Color.black });
overlaidPlot.setSeriesStroke(new Stroke[] {new BasicStroke(5)});
return new JFreeChart(dataset, overlaidPlot,
"CashFlow example", JFreeChart.DEFAULT_TITLE_FONT, true);
}
}

[David Gilbert]

Hi Michal,

You cannot combine category plots in 0.8.1. The next release will have this feature...you can check out the code from CVS on SourceForge.

Regards,

DG.

[Ansh Desi]

Hi Dave,

Is this true for release 0.9.0 too?

If not, then where does com.jrefinery.chart.combination.* lie?

Thanks

[David Gilbert]

The combined charts were reorganised in 0.9.0. Now you can just use the following classes in the com.jrefinery.chart package:

CombinedXYPlot
OverlaidXYPlot
OverlaidVerticalCategoryPlot

There's a demo for each in the com.jrefinery.chart.demo package.

Regards,

DG.

[Kieran Cummins]

With version 0.9.0 is it possible to construct a Vertically Combined Chart with a category axis as the Horizontal axis. I do not wish to construct a overlaid combined chart.

Regards,

Kieran