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This demo illustrates the Chart widget's data aggregation feature using the line, range area, and bar series. The line series shows temperature changes using average, minimum, or maximum temperature values in the selected time interval. The range area series shows the temperature range for the same time interval and uses a custom aggregate function. The bar series illustrates precipitation and is not aggregated.

www.worldweatheronline.com
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$(function(){ var chart = $("#chart").dxChart({ dataSource: dataSource, title: "Weather in Las Vegas, NV (2017)", commonSeriesSettings: { argumentField: "date" }, argumentAxis: { argumentType: "datetime", aggregationInterval: "week", valueMarginsEnabled: false }, valueAxis: [{ name: "temperature", title: { text: "Temperature, °C", font: { color: "#e91e63" } }, label: { font: { color: "#e91e63" } } }, { name: "precipitation", position: "right", title: { text: "Precipitation, mm", font: { color: "#03a9f4" } }, label: { font: { color: "#03a9f4" } } } ], legend: { visible: false }, series: [{ axis: "precipitation", color: "#03a9f4", type: "bar", valueField: "precip", name: "Precipitation" }, { axis: "temperature", color: "#ffc0bb", type: "rangeArea", rangeValue1Field: "minTemp", rangeValue2Field: "maxTemp", aggregation: { enabled: true, method: "custom", calculate: function(aggregationInfo, series) { if(!aggregationInfo.data.length) { return; } var temp = aggregationInfo.data.map(function(item) { return item.temp; }), maxTemp = Math.max.apply(null, temp), minTemp = Math.min.apply(null, temp); return { date: aggregationInfo.intervalStart, maxTemp: maxTemp, minTemp: minTemp }; } }, name: "Temperature range" }, { axis: "temperature", color: "#e91e63", valueField: "temp", point: { size: 7 }, aggregation: { enabled: true }, name: "Average temperature" }], tooltip: { enabled: true, customizeTooltip: function (arg) { return customTooltipHandlers[arg.seriesName](arg, arg.point.aggregationInfo); } } }).dxChart("instance"); $("#useAggregationToggle").dxCheckBox({ text: "Aggregation enabled", value: true, onValueChanged: function(data) { chart.option("series[1].aggregation.enabled", data.value); chart.option("series[2].aggregation.enabled", data.value); } }); $("#aggregateIntervalSelector").dxSelectBox({ items: intervals, value: "week", valueExpr: "interval", displayExpr: "displayName", onValueChanged: function(data) { chart.option("argumentAxis.aggregationInterval", data.value); } }); $("#aggregateFunctionSelector").dxSelectBox({ items: functions, value: "avg", valueExpr: "func", displayExpr: "displayName", onValueChanged: function(data) { chart.option("series[2].aggregation.method", data.value); } }); var customTooltipHandlers = { "Average temperature": function(arg, aggregationInfo) { var start = aggregationInfo && aggregationInfo.intervalStart, end = aggregationInfo && aggregationInfo.intervalEnd; return { text: (!aggregationInfo ? "Date: " + arg.argument.toDateString() : "Interval: " + start.toDateString() + " - " + end.toDateString()) + "<br/>Temperature: " + arg.value.toFixed(2) + " °C" }; }, "Temperature range": function(arg, aggregationInfo) { var start = aggregationInfo.intervalStart, end = aggregationInfo.intervalEnd; return { text: "Interval: " + start.toDateString() + " - " + end.toDateString() + "<br/>Temperature range: " + arg.rangeValue1 + " - " + arg.rangeValue2 + " °C" }; }, "Precipitation": function(arg) { return { text: "Date: " + arg.argument.toDateString() + "<br/>Precipitation: " + arg.valueText + " mm" }; } }; });
<!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/3.1.0/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery-3.1.0.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/18.1.3/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/18.1.3/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/18.1.3/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/18.1.3/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-demo"> <div id="chart"></div> <div class="options"> <div class="caption">Options</div> <div class="option"> <div id="useAggregationToggle"></div> </div> <div class="option"> <span>Interval:</span> <div id="aggregateIntervalSelector"></div> </div> <div class="option"> <span>Method:</span> <div id="aggregateFunctionSelector"></div> </div> </div> </div> </div> </body> </html>
#chart-demo { height: 700px; width: 100%; } #chart { height: 500px; margin: 0 0 15px; } .options { padding: 20px; margin-top: 20px; background-color: rgba(191, 191, 191, 0.15); } .caption { font-size: 18px; font-weight: 500; } .option { margin-top: 10px; } .option > span { width: 50px; display: inline-block; margin-right: 10px; } .option > .dx-selectbox { display: inline-block; vertical-align: middle; }
var intervals = [{ displayName: "One week", interval: "week" }, { displayName: "Two weeks", interval: { weeks: 2 } }, { displayName: "Month", interval: "month" }]; var functions = [{ displayName: "Average", func: "avg" }, { displayName: "Minimum", func: "min" }, { displayName: "Maximum", func: "max" }]; var dataSource = [{ "date":"2017-01-01", "temp":9.5, "precip":0.1 }, { "date":"2017-01-02", "temp":8, "precip":0.4 }, { "date":"2017-01-03", "temp":7.5, "precip":0.2 }, { "date":"2017-01-04", "temp":8.5, "precip":0.1 }, { "date":"2017-01-05", "temp":10, "precip":0.3 }, { "date":"2017-01-06", "temp":3, "precip":0 }, { "date":"2017-01-07", "temp":5, "precip":0.3 }, { "date":"2017-01-08", "temp":9.5, "precip":0 }, { "date":"2017-01-09", "temp":11, "precip":0.5 }, { "date":"2017-01-10", "temp":8, "precip":0 }, { "date":"2017-01-11", "temp":11.5, "precip":0.3 }, { "date":"2017-01-12", "temp":9.5, "precip":2.1 }, { "date":"2017-01-13", "temp":11.5, "precip":3.5 }, { "date":"2017-01-14", "temp":11, "precip":0.1 }, { "date":"2017-01-15", "temp":10.5, "precip":0 }, { "date":"2017-01-16", "temp":6.5, "precip":0 }, { "date":"2017-01-17", "temp":7.5, "precip":0 }, { "date":"2017-01-18", "temp":8, "precip":0.1 }, { "date":"2017-01-19", "temp":8.5, "precip":1.3 }, { "date":"2017-01-20", "temp":5.5, "precip":5.3 }, { "date":"2017-01-21", "temp":9, "precip":0.1 }, { "date":"2017-01-22", "temp":6, "precip":16.6 }, { "date":"2017-01-23", "temp":8.5, "precip":5.5 }, { "date":"2017-01-24", "temp":6.5, "precip":1.3 }, { "date":"2017-01-25", "temp":4.5, "precip":0 }, { "date":"2017-01-26", "temp":5.5, "precip":0 }, { "date":"2017-01-27", "temp":3, "precip":0 }, { "date":"2017-01-28", "temp":6.5, "precip":0 }, { "date":"2017-01-29", "temp":8, "precip":0 }, { "date":"2017-01-30", "temp":10.5, "precip":0 }, { "date":"2017-01-31", "temp":13, "precip":0 }, { "date":"2017-02-01", "temp":10.5, "precip":0 }, { "date":"2017-02-02", "temp":12, "precip":0 }, { "date":"2017-02-03", "temp":13, "precip":0.2 }, { "date":"2017-02-04", "temp":10, "precip":0 }, { "date":"2017-02-05", "temp":11.5, "precip":0 }, { "date":"2017-02-06", "temp":11.5, "precip":0.1 }, { "date":"2017-02-07", "temp":12.5, "precip":0.5 }, { "date":"2017-02-08", "temp":13, "precip":0 }, { "date":"2017-02-09", "temp":15.5, "precip":0 }, { "date":"2017-02-10", "temp":16.5, "precip":0.1 }, { "date":"2017-02-11", "temp":14.5, "precip":0.8 }, { "date":"2017-02-12", "temp":13.5, "precip":0.1 }, { "date":"2017-02-13", "temp":13.5, "precip":0 }, { "date":"2017-02-14", "temp":12, "precip":0 }, { "date":"2017-02-15", "temp":13.5, "precip":0 }, { "date":"2017-02-16", "temp":14.5, "precip":0 }, { "date":"2017-02-17", "temp":12.5, "precip":4.5 }, { "date":"2017-02-18", "temp":10, "precip":14.4 }, { "date":"2017-02-19", "temp":13.5, "precip":0.5 }, { "date":"2017-02-20", "temp":14, "precip":0.6 }, { "date":"2017-02-21", "temp":15, "precip":0 }, { "date":"2017-02-22", "temp":11, "precip":0 }, { "date":"2017-02-23", "temp":7.5, "precip":0 }, { "date":"2017-02-24", "temp":6, "precip":0 }, { "date":"2017-02-25", "temp":7, "precip":0 }, { "date":"2017-02-26", "temp":8, "precip":0 }, { "date":"2017-02-27", "temp":8.5, "precip":0.1 }, { "date":"2017-02-28", "temp":10, "precip":0 }, { "date":"2017-03-01", "temp":9, "precip":0 }, { "date":"2017-03-02", "temp":11, "precip":0 }, { "date":"2017-03-03", "temp":15, "precip":0 }, { "date":"2017-03-04", "temp":14.5, "precip":0 }, { "date":"2017-03-05", "temp":12.5, "precip":0 }, { "date":"2017-03-06", "temp":7.5, "precip":0 }, { "date":"2017-03-07", "temp":11, "precip":0 }, { "date":"2017-03-08", "temp":16, "precip":0 }, { "date":"2017-03-09", "temp":19.5, "precip":0 }, { "date":"2017-03-10", "temp":20, "precip":0 }, { "date":"2017-03-11", "temp":20.5, "precip":0 }, { "date":"2017-03-12", "temp":21.5, "precip":0 }, { "date":"2017-03-13", "temp":21.5, "precip":0 }, { "date":"2017-03-14", "temp":23.5, "precip":0 }, { "date":"2017-03-15", "temp":23, "precip":0 }, { "date":"2017-03-16", "temp":23, "precip":0 }, { "date":"2017-03-17", "temp":22.5, "precip":0 }, { "date":"2017-03-18", "temp":23.5, "precip":0 }, { "date":"2017-03-19", "temp":24, "precip":0 }, { "date":"2017-03-20", "temp":23.5, "precip":0 }, { "date":"2017-03-21", "temp":22, "precip":0 }, { "date":"2017-03-22", "temp":18.5, "precip":4 }, { "date":"2017-03-23", "temp":15, "precip":2.4 }, { "date":"2017-03-24", "temp":20.5, "precip":0 }, { "date":"2017-03-25", "temp":19, "precip":0 }, { "date":"2017-03-26", "temp":18.5, "precip":0 }, { "date":"2017-03-27", "temp":18, "precip":0 }, { "date":"2017-03-28", "temp":17, "precip":0 }, { "date":"2017-03-29", "temp":21, "precip":0 }, { "date":"2017-03-30", "temp":19.5, "precip":0 }, { "date":"2017-03-31", "temp":16.5, "precip":0.2 }, { "date":"2017-04-01", "temp":19, "precip":0 }, { "date":"2017-04-02", "temp":20, "precip":0 }, { "date":"2017-04-03", "temp":18, "precip":0 }, { "date":"2017-04-04", "temp":16.5, "precip":0 }, { "date":"2017-04-05", "temp":17, "precip":0 }, { "date":"2017-04-06", "temp":21.5, "precip":0 }, { "date":"2017-04-07", "temp":22, "precip":0 }, { "date":"2017-04-08", "temp":19, "precip":0.2 }, { "date":"2017-04-09", "temp":14.5, "precip":0 }, { "date":"2017-04-10", "temp":17, "precip":0 }, { "date":"2017-04-11", "temp":19.5, "precip":0 }, { "date":"2017-04-12", "temp":21.5, "precip":0 }, { "date":"2017-04-13", "temp":21.5, "precip":0 }, { "date":"2017-04-14", "temp":19, "precip":0 }, { "date":"2017-04-15", "temp":21, "precip":0 }, { "date":"2017-04-16", "temp":22.5, "precip":0 }, { "date":"2017-04-17", "temp":21.5, "precip":0 }, { "date":"2017-04-18", "temp":21.5, "precip":0 }, { "date":"2017-04-19", "temp":21.5, "precip":0 }, { "date":"2017-04-20", "temp":22, "precip":0 }, { "date":"2017-04-21", "temp":20, "precip":0 }, { "date":"2017-04-22", "temp":23, "precip":0 }, { "date":"2017-04-23", "temp":26, "precip":0 }, { "date":"2017-04-24", "temp":25, "precip":0 }, { "date":"2017-04-25", "temp":22, "precip":0 }, { "date":"2017-04-26", "temp":23.5, "precip":0 }, { "date":"2017-04-27", "temp":23, "precip":0 }, { "date":"2017-04-28", "temp":19, "precip":0 }, { "date":"2017-04-29", "temp":19.5, "precip":0 }, { "date":"2017-04-30", "temp":21.5, "precip":0 }, { "date":"2017-05-01", "temp":26, "precip":0 }, { "date":"2017-05-02", "temp":26, "precip":0 }, { "date":"2017-05-03", "temp":25.5, "precip":0 }, { "date":"2017-05-04", "temp":28, "precip":0 }, { "date":"2017-05-05", "temp":28.5, "precip":0 }, { "date":"2017-05-06", "temp":27, "precip":0.4 }, { "date":"2017-05-07", "temp":17, "precip":0.1 }, { "date":"2017-05-08", "temp":17, "precip":0 }, { "date":"2017-05-09", "temp":20, "precip":1.7 }, { "date":"2017-05-10", "temp":19.5, "precip":0.3 }, { "date":"2017-05-11", "temp":23, "precip":0 }, { "date":"2017-05-12", "temp":26, "precip":0 }, { "date":"2017-05-13", "temp":22.5, "precip":0 }, { "date":"2017-05-14", "temp":23, "precip":0 }, { "date":"2017-05-15", "temp":19.5, "precip":0 }, { "date":"2017-05-16", "temp":20, "precip":0 }, { "date":"2017-05-17", "temp":18.5, "precip":0 }, { "date":"2017-05-18", "temp":19.5, "precip":0 }, { "date":"2017-05-19", "temp":21.5, "precip":0 }, { "date":"2017-05-20", "temp":24, "precip":0 }, { "date":"2017-05-21", "temp":27.5, "precip":0 }, { "date":"2017-05-22", "temp":29, "precip":0 }, { "date":"2017-05-23", "temp":30.5, "precip":0 }, { "date":"2017-05-24", "temp":31, "precip":0 }, { "date":"2017-05-25", "temp":29.5, "precip":0 }, { "date":"2017-05-26", "temp":27, "precip":0 }, { "date":"2017-05-27", "temp":26, "precip":0 }, { "date":"2017-05-28", "temp":29, "precip":0 }, { "date":"2017-05-29", "temp":30.5, "precip":0 }, { "date":"2017-05-30", "temp":31.5, "precip":0 }, { "date":"2017-05-31", "temp":29.5, "precip":0 }, { "date":"2017-06-01", "temp":28, "precip":0 }, { "date":"2017-06-02", "temp":30, "precip":0 }, { "date":"2017-06-03", "temp":32.5, "precip":0 }, { "date":"2017-06-04", "temp":32, "precip":0 }, { "date":"2017-06-05", "temp":31.5, "precip":0 }, { "date":"2017-06-06", "temp":33, "precip":0 }, { "date":"2017-06-07", "temp":32.5, "precip":0 }, { "date":"2017-06-08", "temp":31.5, "precip":0 }, { "date":"2017-06-09", "temp":31.5, "precip":0 }, { "date":"2017-06-10", "temp":29, "precip":0 }, { "date":"2017-06-11", "temp":26, "precip":0 }, { "date":"2017-06-12", "temp":21, "precip":0 }, { "date":"2017-06-13", "temp":25, "precip":0 }, { "date":"2017-06-14", "temp":30.5, "precip":0 }, { "date":"2017-06-15", "temp":32, "precip":0 }, { "date":"2017-06-16", "temp":34.5, "precip":0 }, { "date":"2017-06-17", "temp":36, "precip":0 }, { "date":"2017-06-18", "temp":36, "precip":0 }, { "date":"2017-06-19", "temp":37.5, "precip":0 }, { "date":"2017-06-20", "temp":39, "precip":0 }, { "date":"2017-06-21", "temp":38, "precip":0 }, { "date":"2017-06-22", "temp":37.5, "precip":0 }, { "date":"2017-06-23", "temp":37, "precip":0 }, { "date":"2017-06-24", "temp":37.5, "precip":0 }, { "date":"2017-06-25", "temp":37, "precip":0 }, { "date":"2017-06-26", "temp":36.5, "precip":0 }, { "date":"2017-06-27", "temp":34, "precip":0 }, { "date":"2017-06-28", "temp":34, "precip":0 }, { "date":"2017-06-29", "temp":37.5, "precip":0 }, { "date":"2017-06-30", "temp":35, "precip":0 }, { "date":"2017-07-01", "temp":37.5, "precip":0 }, { "date":"2017-07-02", "temp":35.5, "precip":0 }, { "date":"2017-07-03", "temp":36.5, "precip":0 }, { "date":"2017-07-04", "temp":37, "precip":0 }, { "date":"2017-07-05", "temp":39, "precip":0 }, { "date":"2017-07-06", "temp":39.5, "precip":0 }, { "date":"2017-07-07", "temp":40, "precip":0 }, { "date":"2017-07-08", "temp":39, "precip":0 }, { "date":"2017-07-09", "temp":36.5, "precip":0 }, { "date":"2017-07-10", "temp":37, "precip":0 }, { "date":"2017-07-11", "temp":36.5, "precip":0.1 }, { "date":"2017-07-12", "temp":36.5, "precip":0 }, { "date":"2017-07-13", "temp":38, "precip":0 }, { "date":"2017-07-14", "temp":39.5, "precip":0 }, { "date":"2017-07-15", "temp":40, "precip":0 }, { "date":"2017-07-16", "temp":38.5, "precip":0 }, { "date":"2017-07-17", "temp":37, "precip":0 }, { "date":"2017-07-18", "temp":37, "precip":0 }, { "date":"2017-07-19", "temp":34, "precip":0.4 }, { "date":"2017-07-20", "temp":34.5, "precip":0 }, { "date":"2017-07-21", "temp":36.5, "precip":0 }, { "date":"2017-07-22", "temp":36.5, "precip":0 }, { "date":"2017-07-23", "temp":38, "precip":0 }, { "date":"2017-07-24", "temp":34, "precip":0.1 }, { "date":"2017-07-25", "temp":34, "precip":0 }, { "date":"2017-07-26", "temp":33.5, "precip":0.2 }, { "date":"2017-07-27", "temp":36, "precip":0 }, { "date":"2017-07-28", "temp":38, "precip":0 }, { "date":"2017-07-29", "temp":36.5, "precip":0 }, { "date":"2017-07-30", "temp":37.5, "precip":0.1 }, { "date":"2017-07-31", "temp":37, "precip":0 }, { "date":"2017-08-01", "temp":37, "precip":0 }, { "date":"2017-08-02", "temp":35.5, "precip":0.1 }, { "date":"2017-08-03", "temp":33.5, "precip":0.9 }, { "date":"2017-08-04", "temp":32, "precip":0.1 }, { "date":"2017-08-05", "temp":33.5, "precip":0.1 }, { "date":"2017-08-06", "temp":34, "precip":0 }, { "date":"2017-08-07", "temp":33.5, "precip":0 }, { "date":"2017-08-08", "temp":35.5, "precip":0 }, { "date":"2017-08-09", "temp":36, "precip":0 }, { "date":"2017-08-10", "temp":35.5, "precip":0 }, { "date":"2017-08-11", "temp":35, "precip":0 }, { "date":"2017-08-12", "temp":35.5, "precip":0.1 }, { "date":"2017-08-13", "temp":34, "precip":0 }, { "date":"2017-08-14", "temp":32.5, "precip":0 }, { "date":"2017-08-15", "temp":30, "precip":0 }, { "date":"2017-08-16", "temp":31, "precip":0 }, { "date":"2017-08-17", "temp":33.5, "precip":0 }, { "date":"2017-08-18", "temp":34.5, "precip":0 }, { "date":"2017-08-19", "temp":34, "precip":0 }, { "date":"2017-08-20", "temp":33, "precip":0 }, { "date":"2017-08-21", "temp":32, "precip":0 }, { "date":"2017-08-22", "temp":32.5, "precip":0 }, { "date":"2017-08-23", "temp":33, "precip":0 }, { "date":"2017-08-24", "temp":33, "precip":0 }, { 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