AmCharts -使用dataprovider设置最大值轴

// 创建一个图表实例
var chart = am4core.create("chartdiv", am4charts.XYChart);

// 设置数据提供者
chart.data = [{
  "category": "Category 1",
  "value": 10
}, {
  "category": "Category 2",
  "value": 20
}, {
  "category": "Category 3",
  "value": 15
}, {
  "category": "Category 4",
  "value": 25
}];

// 创建一个类别轴
var categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis());
categoryAxis.dataFields.category = "category";
categoryAxis.title.text = "Category";

// 创建一个值轴
var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
valueAxis.title.text = "Value";

// 设置最大值轴
valueAxis.max = 30;

// 创建一个柱状图系列
var series = chart.series.push(new am4charts.ColumnSeries());
series.dataFields.valueY = "value";
series.dataFields.categoryX = "category";
series.name = "Value";
series.columns.template.tooltipText = "{categoryX}: [bold]{valueY}[/]";

// 添加图例
chart.legend = new am4charts.Legend();

// 渲染图表
chart.render();