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    Range Selector

    Logarithmic Scale

    Documentation

    In this demo, a logarithmic axis is used to select a range within a set of rapidly-growing values.

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    window.onload = function () { const dataSource = []; const max = 100; for (let i = 0; i < max; i += 1) { dataSource.push({ arg: 10 ** i * 0.1, val: Math.log(i + 1) / Math.log(0.5) + (Math.random() - 0.5) * (100 / (i + 1)) + 10, }); } const viewModel = { chartOptions: { dataSource, resizePanesOnZoom: true, argumentAxis: { valueMarginsEnabled: false, type: 'logarithmic', label: { format: 'exponential' }, grid: { visible: true, }, minorGrid: { visible: true, }, minorTickCount: 10, }, legend: { visible: false, }, series: {}, }, rangeSelectorOptions: { dataSource, chart: { series: {}, }, scale: { type: 'logarithmic', label: { format: 'exponential' }, minRange: 1, minorTickCount: 10, }, sliderMarker: { format: 'exponential', }, behavior: { callValueChanged: 'onMoving', snapToTicks: false, }, onValueChanged(e) { $('#zoomed-chart').dxChart('instance').getArgumentAxis().visualRange(e.value); }, }, }; ko.applyBindings(viewModel, $('#range-selector-demo').get(0)); };
    <!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/21.2.5/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.5/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/21.2.5/js/dx.all.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> <div id="zoomed-chart" data-bind="dxChart: chartOptions"></div> <div id="range-selector" data-bind="dxRangeSelector: rangeSelectorOptions"></div> </div> </div> </body> </html>
    #zoomed-chart { height: 335px; margin: 0 0 15px; } #range-selector { height: 120px; }