@amcharts/amcharts4/examples/javascript/variable-angle-radar-chart/index.js

amCharts 4

import * as am4core from "@amcharts/amcharts4/core";
import * as am4charts from "@amcharts/amcharts4/charts";
import am4themes_animated from "@amcharts/amcharts4/themes/animated";


am4core.useTheme(am4themes_animated);

let chart = am4core.create("chartdiv", am4charts.RadarChart);

chart.data = [{
  "category": "One",
  "value1": 8,
  "value2": 2,
  "value3": 4,
  "value4": 3
}, {
  "category": "Two",
  "value1": 11,
  "value2": 4,
  "value3": 2,
  "value4": 4
}, {
  "category": "Three",
  "value1": 7,
  "value2": 6,
  "value3": 6,
  "value4": 2
}, {
  "category": "Four",
  "value1": 13,
  "value2": 8,
  "value3": 3,
  "value4": 2
}, {
  "category": "Five",
  "value1": 12,
  "value2": 10,
  "value3": 5,
  "value4": 1
}, {
  "category": "Six",
  "value1": 15,
  "value2": 12,
  "value3": 4,
  "value4": 4
}, {
  "category": "Seven",
  "value1": 9,
  "value2": 14,
  "value3": 6,
  "value4": 2
}, {
  "category": "Eight",
  "value1": 6,
  "value2": 16,
  "value3": 5,
  "value4": 1
}]


chart.padding(10, 10, 10, 10);

chart.radius = am4core.percent(95);
chart.startAngle = 179.5;
chart.endAngle = 360.5;

chart.innerRadius = am4core.percent(60);

let categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis());
categoryAxis.dataFields.category = "category";
categoryAxis.renderer.minGridDistance = 60;
categoryAxis.renderer.labels.template.location = 0.5;
categoryAxis.renderer.grid.template.location = 1;
categoryAxis.interactionsEnabled = false;

let valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
valueAxis.tooltip.disabled = true;
valueAxis.renderer.minGridDistance = 20;
valueAxis.renderer.grid.template.strokeOpacity = 0.05
valueAxis.renderer.labels.template.fontSize = 9;
valueAxis.interactionsEnabled = false;
valueAxis.renderer.axisAngle = 260;
//valueAxis.renderer.gridType = "polygons";
valueAxis.min = 0;

let series1 = chart.series.push(new am4charts.RadarColumnSeries());
series1.columns.template.width = am4core.percent(80);
series1.name = "Series 1";
series1.dataFields.categoryX = "category";
series1.columns.template.tooltipText = "{name}: {valueY.value}";
series1.dataFields.valueY = "value2";
series1.stacked = true;

let series2 = chart.series.push(new am4charts.RadarColumnSeries());
series2.columns.template.width = am4core.percent(80);
series2.columns.template.tooltipText = "{name}: {valueY.value}";
series2.name = "Series 2";
series2.dataFields.categoryX = "category";
series2.dataFields.valueY = "value2";
series2.stacked = true;

let series3 = chart.series.push(new am4charts.RadarColumnSeries());
series3.columns.template.width = am4core.percent(80);
series3.columns.template.tooltipText = "{name}: {valueY.value}";
series3.name = "Series 3";
series3.dataFields.categoryX = "category";
series3.dataFields.valueY = "value3";
series3.stacked = true;

let series4 = chart.series.push(new am4charts.RadarColumnSeries());
series4.columns.template.width = am4core.percent(80);
series4.columns.template.tooltipText = "{name}: {valueY.value}";
series4.name = "Series 4";
series4.dataFields.categoryX = "category";
series4.dataFields.valueY = "value4";
series4.stacked = true;

chart.seriesContainer.zIndex = -1;

let slider = chart.createChild(am4core.Slider);
slider.start = 0.5;
slider.events.on("rangechanged", () => {

  let start = slider.start;

  chart.startAngle = 270 - start * 179 - 1;
  chart.endAngle = 270 + start * 179 + 1;

  valueAxis.renderer.axisAngle = chart.startAngle;
})