Points Aggregation
Documentation
This demo illustrates the Chart'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.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
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$(() => {
const chart = $('#chart').dxChart({
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(aggregationInfo) {
if (!aggregationInfo.data.length) {
return null;
}
const temp = aggregationInfo.data.map((item) => item.temp);
const maxTemp = Math.max.apply(null, temp);
const minTemp = Math.min.apply(null, temp);
return {
date: new Date((aggregationInfo.intervalStart.valueOf()
+ aggregationInfo.intervalEnd.valueOf()) / 2),
maxTemp,
minTemp,
};
},
},
name: 'Temperature range',
}, {
axis: 'temperature',
color: '#e91e63',
valueField: 'temp',
point: {
size: 7,
},
aggregation: {
enabled: true,
},
name: 'Average temperature',
}],
tooltip: {
enabled: true,
customizeTooltip(arg) {
return customTooltipHandlers[arg.seriesName](arg, arg.point.aggregationInfo);
},
},
}).dxChart('instance');
$('#useAggregationToggle').dxCheckBox({
text: 'Aggregation enabled',
value: true,
onValueChanged(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(data) {
chart.option('argumentAxis.aggregationInterval', data.value);
},
});
$('#aggregateFunctionSelector').dxSelectBox({
items: functions,
value: 'avg',
valueExpr: 'func',
displayExpr: 'displayName',
onValueChanged(data) {
chart.option('series[2].aggregation.method', data.value);
},
});
const customTooltipHandlers = {
'Average temperature': function (arg, aggregationInfo) {
const start = aggregationInfo && aggregationInfo.intervalStart;
const end = aggregationInfo && aggregationInfo.intervalEnd;
return {
text: `${!aggregationInfo
? `Date: ${arg.argument.toDateString()}`
: `Interval: ${start.toDateString()
} - ${end.toDateString()}`
}<br/>Temperature: ${arg.value.toFixed(2)} °C`,
};
},
'Temperature range': function (arg, aggregationInfo) {
const start = aggregationInfo.intervalStart;
const end = aggregationInfo.intervalEnd;
return {
text: `Interval: ${start.toDateString()
} - ${end.toDateString()
}<br/>Temperature range: ${arg.rangeValue1
} - ${arg.rangeValue2} °C`,
};
},
Precipitation(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/3.5.1/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/22.2.3/css/dx.light.css" />
<script src="https://cdn3.devexpress.com/jslib/22.2.3/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;
}
const intervals = [{
displayName: 'One week',
interval: 'week',
}, {
displayName: 'Two weeks',
interval: { weeks: 2 },
}, {
displayName: 'Month',
interval: 'month',
}];
const functions = [{
displayName: 'Average',
func: 'avg',
}, {
displayName: 'Minimum',
func: 'min',
}, {
displayName: 'Maximum',
func: 'max',
}];
const 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,
},
{
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