如何从amchart4列条形图的特定列中删除或隐藏0或空值系列的空间

Question

我正在尝试构建amchart4的动态列图，其中我有4个系列的test_type = FA1，FA2，FA3和FA4，两列=数学和科学，现在数学具有两个值FA1和FA2，科学具有两个值FA3和FA4

现在发生了什么，我使用循环创建了系列，取决于系列test_type，现在在输出列1中，这是数学运算，它显示4个系列，其中两个条分别表示FA1，FA2和两个空白FA3，FA4 与第二栏中的科学相同，它显示了4系列，其中两个栏分别用于FA3，FA4和两个空白FA1，FA2

我用过amchart4

   var data = JSON.parse(document.getElementById("chartdata").innerHTML);
                    var dataprovider = data.data;
                    var serieslist = data.test_type_list;
                    
                    var chart = am4core.create("chartdiv", am4charts.XYChart);
                    chart.data = dataprovider;
                    var categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis());
                    categoryAxis.dataFields.category = "suject";
                    categoryAxis.renderer.grid.template.location = 0;
                    categoryAxis.renderer.minGridDistance = 30;


                    var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

                    for (var i = 0; i < serieslist.length; i++) {
                        var series = chart.series.push(new am4charts.ColumnSeries());
                        series.dataFields.valueY = serieslist[i];
                        series.dataFields.categoryX = "suject";
                        series.name = serieslist[i];
                        series.columns.template.tooltipText = serieslist[i] + ":[bold]{valueY}[/]";
                        series.columns.template.fillOpacity = .8;

                      
                    }

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="//www.amcharts.com/lib/4/core.js"></script>
<script src="//www.amcharts.com/lib/4/charts.js"></script>
<div id="chartdiv"></div>
<div id="chartdata">{"data":[{"suject":"maths","fa1":"70"},{"suject":"maths","fa2":"20"},{"suject":"science","fa4":"10"},{"suject":"science","fa3":"80"}],"test_type_list":["fa1","fa2","fa3","fa4"]}</div>

我只需要那些具有序列值的列，例如在我的情况下，第一列中只有两个小节FA1和FA2的值是数学值，而没有空值或0值序列的值即FA3和FA4