A line chart is a type of chart that displays information as series of the data points connected by straight line segments.
Line series has a crosshair marker - a round mark which is moving along the series' line while the cursor is moving along the timescale.
const lineSeries = chart.addLineSeries();
// set data
lineSeries.setData([
{ time: "2018-12-01", value: 32.51 },
{ time: "2018-12-02", value: 31.11 },
{ time: "2018-12-03", value: 27.02 },
{ time: "2018-12-04", value: 27.32 },
{ time: "2018-12-05", value: 25.17 },
{ time: "2018-12-06", value: 28.89 },
{ time: "2018-12-07", value: 25.46 },
{ time: "2018-12-08", value: 23.92 },
{ time: "2018-12-09", value: 22.68 },
{ time: "2018-12-10", value: 22.67 },
{ time: "2018-12-11", value: 27.57 },
{ time: "2018-12-12", value: 24.11 },
{ time: "2018-12-13", value: 30.74 },
]);Each item of the line series should include the following field:
time(Time) - a time of the itemvalue(number) - a value of the item
A line itself can be customized by setting its color, width and style.
Also, the crosshair marker which is enabled by default, can be either disabled or have its radius adjusted.
A line series interface can be customized using the following options:
| Name | Type | Default | Description |
|---|---|---|---|
color |
string |
#2196f3 |
Line color |
lineStyle |
LineStyle | LineStyle.Solid |
Line style |
lineWidth |
number |
3 |
Line width (in pixels) |
crosshairMarkerVisible |
boolean |
true |
If true, the crosshair marker is shown on a chart |
crosshairMarkerRadius |
number |
4 |
Crosshair marker radius (in pixels) |
lineType |
LineType | LineType.Simple |
Line type |
-
set initial options for line series:
const lineSeries = chart.addLineSeries({ color: '#f48fb1', lineStyle: 0, lineWidth: 1, crosshairMarkerVisible: true, crosshairMarkerRadius: 6, lineType: 1, });
-
change options after series is created:
// for example, let's override line width and color only lineSeries.applyOptions({ color: 'rgba(255, 44, 128, 1)', lineWidth: 3, });