Charts - Discrete Data

This example demonstrates how to visualize discrete data using the PolarChart component. Months in the data source form discrete categories that divide the PolarChart. In addition, you can spot the difference between series types. Use the drop-down menu below the PolarChart to change the applied series type.

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Backend API

<div class="long-title"><h3>Average temperature in London</h3></div> <div id="chart-demo"> @(Html.DevExtreme().PolarChart() .ID("radarChart") .DataSource(new[] { new { arg = "January", day = 6, night = 2 }, new { arg = "February", day = 7, night = 2 }, new { arg = "March", day = 10, night = 3 }, new { arg = "April", day = 14, night = 5 }, new { arg = "May", day = 18, night = 8 }, new { arg = "June", day = 21, night = 11 }, new { arg = "July", day = 22, night = 13 }, new { arg = "August", day = 22, night = 13 }, new { arg = "September", day = 19, night = 11 }, new { arg = "October", day = 15, night = 8 }, new { arg = "November", day = 10, night = 5 }, new { arg = "December", day = 7, night = 3 } }) .Margin(m => m.Top(50).Bottom(50).Left(100)) .Series(s => { s.Add().ValueField("day").Name("Day").Color("#ba4d51"); s.Add().ValueField("night").Name("Night").Color("#5f8b95"); }) .CommonSeriesSettings(s => s.Type(PolarChartSeriesType.Scatter)) ) <div class="center"> <div>Series Type</div>  @(Html.DevExtreme().SelectBox() .Width(200) .InputAttr("aria-label", "Series Type") .DataSource(new[] { "scatter", "line", "area", "bar", "stackedbar" }) .Value("scatter") .OnValueChanged(@<text> function(e) { $("#radarChart").dxPolarChart("instance").option("commonSeriesSettings.type", e.value); } </text>) ) </div> </div>

using DevExtreme.AspNet.Data; using DevExtreme.AspNet.Mvc; using DevExtreme.MVC.Demos.Models.SampleData; using Newtonsoft.Json; using System; using System.Collections.Generic; using System.Linq; using System.Web.Mvc; namespace DevExtreme.MVC.Demos.Controllers { public class ChartsController : Controller { public ActionResult DiscreteData() { return View(); } } }

#chart-demo { height: 600px; } #radarChart { height: 500px; } #chart-demo > .center { text-align: center; } #chart-demo > .center > div, #chart-demo > .center > .dx-widget { display: inline-block; vertical-align: middle; } .long-title h3 { font-family: 'Segoe UI Light', 'Helvetica Neue Light', 'Segoe UI', 'Helvetica Neue', 'Trebuchet MS', Verdana; font-weight: 200; font-size: 28px; text-align: center; margin-bottom: 20px; }