[jCharts-users] Can't display two datasets

[Stephen Q. <st...@ni...>]

Hi,

I'm new to JCharts.  I have modified the ComboChart example to display
two datasets.  After defining the two datasets, I use addIAxisPlotDataSet()
to add each dataset to a dataSeries.  However, for some reason, only the
last dataset added is visible in the graph.  I have tried this with some of
the other examples (e.g., the ScatterPlotDataSeries/DataSet) and it seems
to only render one dataset (typically, the last dataset added to the chart).
I cannot seem to find a working example of two separate datasets in
JCharts 0.7.5.  Perhaps I am adding datasets incorrectly?  (by the way,
I am using JDK 1.4.2 on 64-bit Fedora/Linux and Jakarta Tomcat 5.0.29).

Here is my small modification to the ComboChartServlet example:

try
{
    String[] xAxisLabels = {"1995", "1996", "1997", "1998", "1999", "2000", 
"2001", "2002", "2003", "2004"};
    String xAxisTitle = "Years";
    String yAxisTitle = "Problems";
    String title = "Micro$oft At Work";
    IAxisDataSeries dataSeries = new DataSeries( xAxisLabels, xAxisTitle, 
yAxisTitle, title );

    double[][] data = new double[][]{{1500, 6880, 4510, 2600, 1200, 1580, 
8000, 4555, 4000, 6120}};
    double[][] data2 = new double[][]{{1000, 2000, 3000, 4000, 5000, 6000, 
6100, 6500, 7000, 8000}};

    String[] legendLabels = {"Bugs"};
    Paint[] linePaints = new Paint[]{Color.red};
    Paint[] linePaints2 = new Paint[]{Color.blue};
    dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data, 
legendLabels, linePaints, ChartType.LINE, this.lineChartProperties ) );
    dataSeries.addIAxisPlotDataSet( new AxisChartDataSet( data2, 
legendLabels, linePaints2, ChartType.LINE, this.lineChartProperties ) );

    AxisChart axisChart = new AxisChart( dataSeries, this.chartProperties, 
this.axisProperties, this.legendProperties, this.width, this.height );
    ServletEncoderHelper.encodeJPEG13( axisChart, 1.0f, response );
}
catch ()...


Here, only data2 (in blue) is rendered.  How do I get both datasets to be 
rendered on the chart?


Thanks,
Steve






--
Stephen Quirolgico, Ph.D.
National Institute of Standards and Technology
100 Bureau Dr., Stop 8920
Gaithersburg, MD 20899-8920  USA
Tel: (301) 975-8426
Fax: (301) 590-0932
WWW: http://www.antd.nist.gov/~steveq