Incorrect x-axis value for multiple histogram

[bwong43]

I am trying to create a chart with 2 histogram data. The first set of data is [0,1,2], and the second set is [-2,-1, 0]

However, the chart wasn't as I expected. The expected x-axis I expected is [-2,-1,0,1,2], however, the x-axis value returned is [0,1,2] Is there's anything I can do to fix the issue? Thanks

// Create Chart
        CategoryChart chart =  new CategoryChartBuilder().width(800).height(600).title("Score Histogram")
                        .xAxisTitle("Mean").yAxisTitle("Count").build();

        // Customize Chart
        chart.getStyler().setLegendPosition(Styler.LegendPosition.InsideNW);
        chart.getStyler().setXAxisMaxLabelCount(10);
        chart.getStyler().setXAxisDecimalPattern("0.0");
        chart.getStyler().setStacked(true);

        // Series
        Histogram histogram1 = new Histogram(Arrays.asList(0, 1, 2), 100);
        chart.addSeries("Price", histogram1.getxAxisData(), histogram1.getyAxisData());
        Histogram histogram2 = new Histogram(Arrays.asList(-2, -1, 0), 100);
        chart.addSeries("Percentage ", histogram2.getxAxisData(), histogram2.getyAxisData());

[Mr14huashao]

@bwong43 CategoryChart multiple series, the x-axis calculation takes the first series.

@timmolter When CategoryChart adds multiple series, the xData value is not the same, the problem mentioned above will appear.

[timmolter]

The way it works now is that you have to pass in null Y-Axis values and have matching X-Axis value for ll added series. Something like:

    chart.addSeries("female", Arrays.asList(10, 20, 30, 40, 50), Arrays.asList(50, 10, 20, 40, 35));
    chart.addSeries("male", Arrays.asList(10, 20, 30, 40, 50), Arrays.asList(40, 30, 20, null, 60));

However, I think your way is what most people would expect to "just work". I'll leave this open as a feature request...