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Charts

Dynamic Series from the DataSource

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In this example, data for series is provided in a peculiar manner. Each object in the data source represents a point in a single series. To define series in this case, use the seriesTemplate object where you need to specify the data field providing series names and custom settings for a given series. Settings common to all series must be set within the commonSeriesSettings object. Providing data in this manner is useful when the number of points within a single series changes over time.

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window.onload = function () { const viewModel = { chartOptions: { palette: 'violet', dataSource, commonSeriesSettings: { argumentField: 'country', valueField: 'oil', type: 'bar', }, seriesTemplate: { nameField: 'year', customizeSeries(valueFromNameField) { return valueFromNameField === 2009 ? { type: 'line', label: { visible: true }, color: '#ff3f7a' } : {}; }, }, title: { text: 'Oil Production', subtitle: { text: '(in millions tonnes)', }, }, export: { enabled: true, }, legend: { verticalAlignment: 'bottom', horizontalAlignment: 'center', }, }, }; ko.applyBindings(viewModel, document.getElementById('chart-demo')); };
<!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> <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.3/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/21.2.3/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" data-bind="dxChart: chartOptions"></div> </div> </div> </body> </html>
#chart { height: 440px; width: 100%; }
const dataSource = [{ year: 1970, country: 'Saudi Arabia', oil: 192.2, }, { year: 1970, country: 'USA', oil: 533.5, }, { year: 1970, country: 'Iran', oil: 192.6, }, { year: 1970, country: 'Mexico', oil: 24.2, }, { year: 1980, country: 'Saudi Arabia', oil: 509.8, }, { year: 1980, country: 'USA', oil: 480.2, }, { year: 1980, country: 'Iran', oil: 74.3, }, { year: 1980, country: 'Mexico', oil: 107.2, }, { year: 1990, country: 'Saudi Arabia', oil: 342.6, }, { year: 1990, country: 'USA', oil: 416.6, }, { year: 1990, country: 'Iran', oil: 162.8, }, { year: 1990, country: 'Mexico', oil: 146.3, }, { year: 1990, country: 'Russia', oil: 515.9, }, { year: 2000, country: 'Saudi Arabia', oil: 456.3, }, { year: 2000, country: 'USA', oil: 352.6, }, { year: 2000, country: 'Iran', oil: 191.3, }, { year: 2000, country: 'Mexico', oil: 171.2, }, { year: 2000, country: 'Russia', oil: 323.3, }, { year: 2008, country: 'Saudi Arabia', oil: 515.3, }, { year: 2008, country: 'USA', oil: 304.9, }, { year: 2008, country: 'Iran', oil: 209.9, }, { year: 2008, country: 'Mexico', oil: 157.7, }, { year: 2008, country: 'Russia', oil: 488.5, }, { year: 2009, country: 'Saudi Arabia', oil: 459.5, }, { year: 2009, country: 'USA', oil: 325.3, }, { year: 2009, country: 'Iran', oil: 202.4, }, { year: 2009, country: 'Mexico', oil: 147.5, }, { year: 2009, country: 'Russia', oil: 494.2, }, ];