Error Bars

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If your data contains an error or measurement uncertainty, you can indicate a confidential interval on the Chart using error bars. To configure them, use the fields of the series’ valueErrorBar object. In this example, error bars indicate a range of average temperatures (on the upper pane) and humidity (on the lower pane) for a specific month.

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$(function(){ $("#chart").dxChart({ dataSource: dataSource, commonSeriesSettings: { argumentField: "month", }, panes: [{ name: "top" }, { name: "bottom" }], defaultPane: "bottom", series:[{ pane: "top", valueField: "avgT", name: "Average Temperature, °C", valueErrorBar: { lowValueField: "avgLowT", highValueField: "avgHighT", lineWidth: 1, opacity: 0.8 } }, { pane: "bottom", valueField: "avgH", type: "bar", name: "Average Humidity, %", valueErrorBar: { type: "fixed", value: 3, lineWidth: 1 } }], argumentAxis: { label: { displayMode: "stagger" } }, "export": { enabled: true }, valueAxis: [{ pane: "top", grid: { visible: true }, title: { text: "Temperature, °C" } }, { tickInterval: 50, pane: "bottom", grid: { visible: true }, title: { text: "Humidity, %" } }], tooltip: { enabled: true, customizeTooltip: function (arg) { return { text: arg.seriesName + ": " + arg.value + " ( range: " + arg.lowErrorValue + " - " + arg.highErrorValue + ")" }; } }, legend: { verticalAlignment: "bottom", horizontalAlignment: "center" }, title: { text: "Weather in Los Angeles, California" } }); });

<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.5/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.5/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/20.2.5/js/dx.all.js"></script> <script src="data.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="chart"></div> </div> </body> </html>

#chart { height: 440px; }

var dataSource = [{ month: "January", avgT: 14.1, avgLowT: 9.1, avgHighT: 19.1, avgH: 70 }, { month: "February", avgT: 14.7, avgLowT: 9.8, avgHighT: 19.6, avgH: 74 }, { month: "March", avgT: 15.6, avgLowT: 10.6, avgHighT: 20.4, avgH: 79 }, { month: "April", avgT: 16.8, avgLowT: 11.9, avgHighT: 21.7, avgH: 80 }, { month: "May", avgT: 18.2, avgLowT: 13.6, avgHighT: 22.7, avgH: 83 }, { month: "June", avgT: 20.2, avgLowT: 15.4, avgHighT: 25, avgH: 85 }, { month: "July", avgT: 22.6, avgLowT: 17.3, avgHighT: 27.9, avgH: 86 }, { month: "August", avgT: 23, avgLowT: 17.7, avgHighT: 28.4, avgH: 86 }, { month: "September", avgT: 22.3, avgLowT: 17, avgHighT: 27.7, avgH: 83 }, { month: "October", avgT: 20.1, avgLowT: 14.8, avgHighT: 25.3, avgH: 79 }, { month: "November", avgT: 17.2, avgLowT: 11.8, avgHighT: 22.7, avgH: 72 }, { month: "December", avgT: 14.6, avgLowT: 9.5, avgHighT: 19.7, avgH: 68 }];