amcharts如何在两个图表之间添加一行

Question

我正在使用amcharts创建条形图我正确地显示了信息，但需要在两个图形之间换行。

我正在为以两种不同模式运行的代码版本提取数据，并且在一个图形中具有一种模式而在另一种图形中具有另一种模式。

示例：图表包含modea的数据以及该代码行的RC和GA版本。图2包含modeb的数据以及该代码行的RC和GA版本。版本相同，只是模式不同。

它们以正确的顺序显示，我只是无法在2之间换行以显示分离。

示例代码：

var chart;
 var chartData = [{
    os: "2.1",
    GAc: 2,
    RCc: 1
},{
    os: "2.2",
    GAc: 6,
    RCc: 1
 },{
    os: "2.1",
    GAb: 5,
    RCb: 1
},{
    os: "2.2",
    GAb: 2,
    RCb: 9
}];

AmCharts.ready(function () {
    chart = new AmCharts.AmSerialChart();
    chart.dataProvider = chartData;
    chart.categoryField = "os";
    chart.plotAreaBorderAlpha = 0.2;
    chart.numberFormatter = {
            precision : 0
        };
    var categoryAxis = chart.categoryAxis;
        categoryAxis.gridAlpha = 0.1;
        categoryAxis.axisAlpha = 0
        categoryAxis.gridPosition = "start";
        categoryAxis.autoWrap = true;
        categoryAxis.labelRotation = 90;
    var valueAxis = new AmCharts.ValueAxis();
        valueAxis.stackType = "regular";
        valueAxis.gridAlpha = 0.1;
        valueAxis.axisAlpha = 0;
        chart.addValueAxis(valueAxis);

    var graph = new AmCharts.AmGraph();
        graph.title = "Mode-Charlie";
        graph.valueField = "GAc";
        graph.type = "column";
        graph.lineAlpha = 0;
        graph.fillAlphas = 1;
        graph.lineColor = "orange";
        chart.addGraph(graph);
    var graph = new AmCharts.AmGraph();
        graph.title = "Mode-Charlie";
        graph.valueField = "RCc";
        graph.type = "column";
        graph.lineAlpha = 0;
        graph.fillAlphas = 1;
        graph.lineColor = "blue";
        chart.addGraph(graph);

    var graph2 = new AmCharts.AmGraph();
        graph2.title = "Mode-Beta";
        graph2.valueField = "GAb";
        graph2.type = "column";
        graph2.lineAlpha = 0;
        graph2.fillAlphas = 1;
        graph2.lineColor = "orange";
        chart.addGraph(graph2);
    var graph2 = new AmCharts.AmGraph();
        graph2.title = "Mode-Beta";
        graph2.valueField = "RCb";
        graph2.type = "column";
        graph2.lineAlpha = 0;
        graph2.fillAlphas = 1;
        graph2.lineColor = "blue";
        chart.addGraph(graph2);

        chart.write("chartdiv");
  });