XY Chart with Double Y axis for common X axis

[ahlvarun]

hi

I am trying to make a chart with common X axis (a Time Field )data and two Y axis in the same graph, one of left hand side (Population for country X)and other on right hand side(Population for country Y).

Can anybody help me regarding what DataSet i should be using for this.
A small snippet of code will be of immense help.

regards
varun

[Zoltan Luspai]

have a look at cewolfexample subproject; there are few examples for combined charts.

[ahlvarun]

hi

i put up a wrong example last time. READ THIS:-

I am trying to make a chart with common X axis (a Time Field )data and two Y axis in the same graph, one of left hand side (Population for country X)and other on right hand side(Birth rate for country X).

Can anybody help me regarding what DataSet i should be using for this.

regards
varun

[Zoltan Luspai]

Hi,

You will need to use either a combined or overlaid chart. See the cewolf examples for the meaning of each type.
To add an extra axis to your chart you can add it with a post-processor. The post processor is to customize the look of your chart. Within that you will needs something like:

  ChartPostProcessor dataColor = new ChartPostProcessor() {
    public void processChart(Object chart, Map params) {
      CategoryPlot plot = (CategoryPlot) ((JFreeChart) chart).getPlot();
     
      NumberAxis axis = new NumberAxis("label");
      plot.setRangeAxis(1, axis);
        plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT);

    }

So by setting the 1st axis you will add a new axist to the chart. Be warned this is just a rough example, I would recommend to get support about charts on jfreechart forums, or get the source for the jfree demos, which contains lots of such examples, here: http://www.jfree.org/jfreechart/jfreechart-1.0.0-demo.jnlp

Cheers,
Zoltan