how to start draw line from X - Y axis at o in JFreeChart ChartFactory.createLineChart

Question

i am creating line chart using JFreeChart.

Line chart draw properly but i want to start at point 0. how can i do that?

public void lineChart()
{
         CategoryDataset ds=createDataset2();
         chart2=ChartFactory.createLineChart("Bar Chart", "OPD Number", "Weight", ds,PlotOrientation.VERTICAL,true,true,false);

         ChartPanel cp = new ChartPanel(chart2);
         jp.add(cp);                     //jp is JPanel 
    }
    public CategoryDataset createDataset2() 
    {
        final DefaultCategoryDataset dataset= new DefaultCategoryDataset();
        final String series1 = "Type1";
        OPDDetailBean ob=new OPDDetailBean();
        ArrayList<OPDDetailBean> aob=new ArrayList<OPDDetailBean>();
        aob=ob.searchOPDDetails("5");
        for(int i=0;i<aob.size();i++)
        {
            dataset.addValue(Integer.parseInt(aob.get(i).getWeight()), series1, ""+(i+1));    
        }
        return dataset;
    }

which give output..

enter image description here

And i want output like.

enter image description here

dataset.addValue(Integer.parseInt(aob.get(i).getWeight()), series1, ""+(i+1)); <--- Why do you use (i+1) as column value? — StanislavL, Dec 16 '13 at 06:26
I'm skimming through the demos, and I don't see any examples where your desired output occurs. Though I see it achieved using `XYPLot` — Paul Samsotha, Dec 16 '13 at 06:39
Question is, why would you want to do that? Does that line represent actual data starting at 0. — Paul Samsotha, Dec 16 '13 at 06:41
Hello StanislavL, i use (i+1) to display OPD Number at X axis; — Daxesh Prajapati, Dec 16 '13 at 07:04

score 3 · Accepted Answer · answered Jan 10 '14 at 13:57

"1", "2", "3", "4" and "5" are categories in your example. You don't have a category "0", so there cannot be a line to it. Either add a category "0" and adapt the axis-margin if you want 0 to be on the left border of the plot. Or probably better: use an XYPlot and corresponding methodes from ChartFactory like createXYLineChart().

hth,
- martin

how to start draw line from X - Y axis at o in JFreeChart ChartFactory.createLineChart

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