Problem with chart values

Question

hi, i've got a simple chart. my xaxis values are: 10:00:00(time), a can't make those values such as that: 1,2,3,4.... please help me
class BinaryPlot{
     final XYDataset data = createStepXYDataset();
     final JFreeChart chart1 = ChartFactory.createXYStepChart(
               "Input",
               "Time",
               "Binary Value",
               data,
               PlotOrientation.VERTICAL,
               true,
               true,
               false
     public static XYDataset createStepXYDataset(){
          final XYSeries s1 = new XYSeries("One",false,true);
          final Object[][] TEST_DATA = {
               {new Integer(1), new Integer(1)},
               {new Integer(2), new Integer(-1)},
               {new Integer(3), new Integer(-1)},
               {new Integer(7), new Integer(1)},
          for(int i = 0;i< TEST_DATA.length; i++){
               s1.add((Integer) TEST_DATA[0], (Integer) TEST_DATA[i][1]);
          final XYSeriesCollection dataset = new XYSeriesCollection();
          dataset.addSeries(s1);
          dataset.
          return dataset;
     XYPlot plot = (XYPlot)chart1.getPlot();
     NumberAxis axis = (NumberAxis)plot.getRangeAxis();
     ChartPanel chartPanel2 = new ChartPanel(chart1);
}//end BinaryPlot

Answer 1

Look at the query Andy proposed:
SELECT NULL LINK, start_date, NVL(sum_of_trans, 0) + 0.001 VALUE
  FROM (SELECT   TRUNC (startdate) start_date,
                 CASE
                    WHEN :p9_view_by = 1
                       THEN ROUND (DURATION / 60, 3)
                    ELSE 1
                 END sum_of_trans
            FROM TRANSACTION
           WHERE trans_id = x AND startdate BETWEEN y AND z
        GROUP BY TRUNC (startdate)) xDoes this query deliver anything?
Denes Kubicek