No-gap Date Axis
It’s a common scenario, especially in financial data, that you have non-continuous data – there are gaps at night or on weekends or holidays. And it is a widespread practice that these gaps are not displayed on the axis, showing only the dates that have data. For this purpose, we created a GaplessDateAxis class, which addresses this use-case. Just replace your DateAxis with this class and that’s it – no more gaps in your chart.
Related tutorials
Demo source
<!-- Styles -->
<style>
#chartdiv {
width: 100%;
height: 500px;
max-width: 100%
}
</style>
<!-- Resources -->
<script src="https://cdn.amcharts.com/lib/5/index.js"></script>
<script src="https://cdn.amcharts.com/lib/5/xy.js"></script>
<script src="https://cdn.amcharts.com/lib/5/themes/Animated.js"></script>
<!-- Chart code -->
<script>
am5.ready(function() {
// Create root element
// https://www.amcharts.com/docs/v5/getting-started/#Root_element
var root = am5.Root.new("chartdiv");
// Set themes
// https://www.amcharts.com/docs/v5/concepts/themes/
root.setThemes([
am5themes_Animated.new(root)
]);
// Create chart
// https://www.amcharts.com/docs/v5/charts/xy-chart/
var chart = root.container.children.push(am5xy.XYChart.new(root, {
panX: true,
panY: true,
wheelX: "panX",
wheelY: "zoomX",
pinchZoomX: true,
paddingLeft: 0
}));
// Add cursor
// https://www.amcharts.com/docs/v5/charts/xy-chart/cursor/
var cursor = chart.set("cursor", am5xy.XYCursor.new(root, {
behavior: "none"
}));
cursor.lineY.set("visible", false);
// Generate random data
var date = new Date();
date.setHours(0, 0, 0, 0);
var value = 1000;
var volume = 100000;
function generateData() {
value = Math.round((Math.random() * 10 - 5) + value);
volume = Math.round((Math.random() * 1000 - 500) + volume);
am5.time.add(date, "day", 1);
// add another if it's saturday
if (date.getDay() == 6) {
am5.time.add(date, "day", 1);
}
// add another if it's sunday
if (date.getDay() == 0) {
am5.time.add(date, "day", 1);
}
return {
date: date.getTime(),
value: value,
volume: volume
};
}
function generateDatas(count) {
var data = [];
for (var i = 0; i < count; ++i) {
data.push(generateData());
}
return data;
}
// Create axes
// https://www.amcharts.com/docs/v5/charts/xy-chart/axes/
var xAxis = chart.xAxes.push(am5xy.GaplessDateAxis.new(root, {
maxDeviation: 0,
baseInterval: {
timeUnit: "day",
count: 1
},
renderer: am5xy.AxisRendererX.new(root, {
minorGridEnabled: true
}),
tooltip: am5.Tooltip.new(root, {})
}));
var yAxis = chart.yAxes.push(am5xy.ValueAxis.new(root, {
extraMin: 0.2,
renderer: am5xy.AxisRendererY.new(root, {})
}));
// Add series
// https://www.amcharts.com/docs/v5/charts/xy-chart/series/
var series = chart.series.push(am5xy.LineSeries.new(root, {
name: "Series",
xAxis: xAxis,
yAxis: yAxis,
valueYField: "value",
valueXField: "date",
tooltip: am5.Tooltip.new(root, {
labelText: "{valueY}"
})
}));
// y axis for volume
var volumeAxisRenderer = am5xy.AxisRendererY.new(root, {});
volumeAxisRenderer.grid.template.set("forceHidden", true);
volumeAxisRenderer.labels.template.set("forceHidden", true);
var volumeAxis = chart.yAxes.push(am5xy.ValueAxis.new(root, {
height: am5.percent(25),
y: am5.percent(100),
centerY: am5.percent(100),
panY: false,
renderer: volumeAxisRenderer
}));
// Add series
// https://www.amcharts.com/docs/v5/charts/xy-chart/series/
var volumeSeries = chart.series.push(am5xy.ColumnSeries.new(root, {
name: "Volume Series",
xAxis: xAxis,
yAxis: volumeAxis,
valueYField: "volume",
valueXField: "date",
tooltip: am5.Tooltip.new(root, {
labelText: "{valueY}"
})
}));
volumeSeries.columns.template.setAll({ fillOpacity: 0.8, strokeOpacity: 0, width: am5.percent(40) })
// Add scrollbar
// https://www.amcharts.com/docs/v5/charts/xy-chart/scrollbars/
chart.set("scrollbarX", am5.Scrollbar.new(root, {
orientation: "horizontal"
}));
// Set data
var data = generateDatas(200);
series.data.setAll(data);
volumeSeries.data.setAll(data);
// Make stuff animate on load
// https://www.amcharts.com/docs/v5/concepts/animations/
series.appear(1000);
chart.appear(1000, 100);
}); // end am5.ready()
</script>
<!-- HTML -->
<div id="chartdiv"></div>