LineChart

A line chart or line plot or line graph is a type of chart which displays information as a series of data points connected by straight line segments.

Source Code

uikit-react-viz

Usage

This example shows a simple line chart with one data series.
Each dot represents a data point, and a tooltip appears on hover.

Set horizontalRangeSlider.show to true to display a range slider below the chart for zooming into specific data ranges.

<HvLineChart
  height={300}
  data={{
    Month: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
    Temperature: [
      9.2, 10.2, 12.3, 13.6, 16.3, 19.7, 21.9, 22.1, 20.1, 16.6, 12.5, 10.1,
    ],
  }}
  groupBy="Month"
  measures="Temperature"
  horizontalRangeSlider={{ show: true }}
/>

<HvLineChart
  height={300}
  data={{
    Month: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
    Temperature: [
      9.2, 10.2, 12.3, 13.6, 16.3, 19.7, 21.9, 22.1, 20.1, 16.6, 12.5, 10.1,
    ],
  }}
  groupBy="Month"
  measures="Temperature"
  horizontalRangeSlider={{ show: true }}
/>

Area

To fill the area below the line, set the area prop to true.

<HvLineChart
  height={300}
  data={{
    Month: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
    Temperature: [
      9.2, 10.2, 12.3, 13.6, 16.3, 19.7, 21.9, 22.1, 20.1, 16.6, 12.5, 10.1,
    ],
  }}
  groupBy="Month"
  measures="Temperature"
  area
/>

<HvLineChart
  height={300}
  data={{
    Month: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
    Temperature: [
      9.2, 10.2, 12.3, 13.6, 16.3, 19.7, 21.9, 22.1, 20.1, 16.6, 12.5, 10.1,
    ],
  }}
  groupBy="Month"
  measures="Temperature"
  area
/>

Mixed line and area

Set the area prop to true to fill the area below the line.
You can also enable it for a specific measure to combine area and line views in the same chart.

<HvLineChart
  height={300}
  data={{
    Quarter: ["Q1", "Q2", "Q3", "Q4"],
    "Sales Target": [4500, 3700, 4300, 5500],
    Sales: [5000, 3300, 3760, 6230],
  }}
  groupBy="Quarter"
  measures={["Sales Target", { field: "Sales", area: true }]}
/>

<HvLineChart
  height={300}
  data={{
    Quarter: ["Q1", "Q2", "Q3", "Q4"],
    "Sales Target": [4500, 3700, 4300, 5500],
    Sales: [5000, 3300, 3760, 6230],
  }}
  groupBy="Quarter"
  measures={["Sales Target", { field: "Sales", area: true }]}
/>

Stacked area chart

The following example shows how to use the stacked prop to stack multiple lines on top of each other.

<HvLineChart
  height={400}
  data={{
    Group: ["Group 1", "Group 2", "Group 3"],
    "Sales Target": [2300, 1000, 8500],
    "Sales Per Rep": [6000, 1000, 1000],
    "Monthly Sales": [3700, 7500, 1100],
    Target: [2100, 8500, 3000],
    Cash: [500, 8000, 9500],
  }}
  groupBy="Group"
  measures={[
    "Sales Target",
    "Sales Per Rep",
    "Monthly Sales",
    "Target",
    "Cash",
  ]}
  area
  stack="total"
/>

<HvLineChart
  height={400}
  data={{
    Group: ["Group 1", "Group 2", "Group 3"],
    "Sales Target": [2300, 1000, 8500],
    "Sales Per Rep": [6000, 1000, 1000],
    "Monthly Sales": [3700, 7500, 1100],
    Target: [2100, 8500, 3000],
    Cash: [500, 8000, 9500],
  }}
  groupBy="Group"
  measures={[
    "Sales Target",
    "Sales Per Rep",
    "Monthly Sales",
    "Target",
    "Cash",
  ]}
  area
  stack="total"
/>

Mixed line and stacked area

You can mix a stacked area chart with a line chart by setting the stack and area props on the specific measures you want to stack.

<HvLineChart
  height={300}
  data={{
    Quarter: ["Q1", "Q2", "Q3", "Q4"],
    "Sales Dep 1": [2300, 9000, 8500, 1000],
    "Sales Dep 2": [6000, 2000, 1000, 2000],
    "Sales Target": [10000, 10000, 10000, 10000],
  }}
  groupBy="Quarter"
  measures={[
    { field: "Sales Dep 1", stack: "total", area: true },
    { field: "Sales Dep 2", stack: "total", area: true },
    { field: "Sales Target" },
  ]}
/>

<HvLineChart
  height={300}
  data={{
    Quarter: ["Q1", "Q2", "Q3", "Q4"],
    "Sales Dep 1": [2300, 9000, 8500, 1000],
    "Sales Dep 2": [6000, 2000, 1000, 2000],
    "Sales Target": [10000, 10000, 10000, 10000],
  }}
  groupBy="Quarter"
  measures={[
    { field: "Sales Dep 1", stack: "total", area: true },
    { field: "Sales Dep 2", stack: "total", area: true },
    { field: "Sales Target" },
  ]}
/>

Multiple lines

You can display multiple lines on the same chart by providing an array of measures to the measures prop.

<HvLineChart
  height={300}
  data={new Map<string, (string | number)[]>()
    .set("Month", [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ])
    .set(
      "Minimum",
      [5.3, 6.0, 7.7, 8.9, 11.4, 14.2, 15.9, 16.1, 14.7, 12.2, 8.6, 6.5],
    )
    .set(
      "Maximum",
      [13.1, 14.4, 16.9, 18.2, 21.3, 25.1, 27.8, 28.1, 25.6, 21.1, 16.3, 13.7],
    )}
  groupBy="Month"
  measures={["Minimum", "Maximum"]}
/>

<HvLineChart
  height={300}
  data={new Map<string, (string | number)[]>()
    .set("Month", [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ])
    .set(
      "Minimum",
      [5.3, 6.0, 7.7, 8.9, 11.4, 14.2, 15.9, 16.1, 14.7, 12.2, 8.6, 6.5],
    )
    .set(
      "Maximum",
      [13.1, 14.4, 16.9, 18.2, 21.3, 25.1, 27.8, 28.1, 25.6, 21.1, 16.3, 13.7],
    )}
  groupBy="Month"
  measures={["Minimum", "Maximum"]}
/>

Multiple lines with splitBy

The following example uses splitBy to divide the data by Country and Medal, generating a line for each combination. Try removing or changing the splitBy criteria in the live editor to see how it affects the chart.

<HvLineChart
  height={400}
  data={{
    Country: [
      "Portugal",
      "Portugal",
      "Spain",
      "Spain",
      "USA",
      "USA",
      "Canada",
      "Canada",
      "Portugal",
      "Portugal",
      "Spain",
      "Spain",
      "USA",
      "USA",
      "Canada",
      "Canada",
      "Portugal",
      "Portugal",
      "Spain",
      "Spain",
      "USA",
      "USA",
      "Canada",
      "Canada",
    ],
    Year: [
      2018, 2018, 2018, 2018, 2018, 2018, 2018, 2018, 2019, 2019, 2019, 2019,
      2019, 2019, 2019, 2019, 2020, 2020, 2020, 2020, 2020, 2020, 2020, 2020,
    ],
    Medal: [
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
    ],
    Total: [
      3, 2, 1, 0, 4, 11, 8, 3, 2, 9, 0, 5, 3, 6, 2, 1, 7, 5, 6, 9, 2, 5, 6, 7,
    ],
  }}
  groupBy="Year"
  measures="Total"
  splitBy={["Country", "Medal"]}
  seriesNameFormatter={(s) => `${s?.split("_").join(" ")}`}
/>

<HvLineChart
  height={400}
  data={{
    Country: [
      "Portugal",
      "Portugal",
      "Spain",
      "Spain",
      "USA",
      "USA",
      "Canada",
      "Canada",
      "Portugal",
      "Portugal",
      "Spain",
      "Spain",
      "USA",
      "USA",
      "Canada",
      "Canada",
      "Portugal",
      "Portugal",
      "Spain",
      "Spain",
      "USA",
      "USA",
      "Canada",
      "Canada",
    ],
    Year: [
      2018, 2018, 2018, 2018, 2018, 2018, 2018, 2018, 2019, 2019, 2019, 2019,
      2019, 2019, 2019, 2019, 2020, 2020, 2020, 2020, 2020, 2020, 2020, 2020,
    ],
    Medal: [
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
      "gold",
      "silver",
    ],
    Total: [
      3, 2, 1, 0, 4, 11, 8, 3, 2, 9, 0, 5, 3, 6, 2, 1, 7, 5, 6, 9, 2, 5, 6, 7,
    ],
  }}
  groupBy="Year"
  measures="Total"
  splitBy={["Country", "Medal"]}
  seriesNameFormatter={(s) => `${s?.split("_").join(" ")}`}
/>

Multiple Y axes

<HvLineChart
  height={400}
  data={{
    Month: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
    Temperature: [
      7.0, 6.2, 4.3, 12.5, 5.3, 12.2, 20.3, 23.4, 25.0, 17.5, 13.0, 11.2,
    ],
    Precipitation: [
      12.6, 15.9, 19.0, 26.0, 28.2, 70.7, 145.6, 132.2, 78.7, 22.8, 4.0, 2.9,
    ],
  }}
  yAxis={[
    {
      id: "temp",
      labelFormatter: (value?: string | number) => `${value} ºC`,
      name: "Temperature",
    },
    {
      id: "prec",
      labelFormatter: (value?: string | number) => `${value} mm`,
      name: "Precipitation",
    },
  ]}
  groupBy="Month"
  measures={[
    {
      field: "Temperature",
      yAxis: "temp",
      valueFormatter: (value?: string | number) => `${value} ºC`,
    },
    {
      field: "Precipitation",
      yAxis: "prec",
      valueFormatter: (value?: string | number) => `${value} mm`,
    },
  ]}
/>

<HvLineChart
  height={400}
  data={{
    Month: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
    Temperature: [
      7.0, 6.2, 4.3, 12.5, 5.3, 12.2, 20.3, 23.4, 25.0, 17.5, 13.0, 11.2,
    ],
    Precipitation: [
      12.6, 15.9, 19.0, 26.0, 28.2, 70.7, 145.6, 132.2, 78.7, 22.8, 4.0, 2.9,
    ],
  }}
  yAxis={[
    {
      id: "temp",
      labelFormatter: (value?: string | number) => `${value} ºC`,
      name: "Temperature",
    },
    {
      id: "prec",
      labelFormatter: (value?: string | number) => `${value} mm`,
      name: "Precipitation",
    },
  ]}
  groupBy="Month"
  measures={[
    {
      field: "Temperature",
      yAxis: "temp",
      valueFormatter: (value?: string | number) => `${value} ºC`,
    },
    {
      field: "Precipitation",
      yAxis: "prec",
      valueFormatter: (value?: string | number) => `${value} mm`,
    },
  ]}
/>

Custom ECharts options

You can customize the chart using ECharts options.

In this example:

The line is rendered as a smooth curve
A markLine is added to show the average
Line and dot colors change based on data point values

<HvLineChart
  height={400}
  data={{
    Month: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
    "Sales Target": [
      5929, 2393, 1590, 7817, 4749, 1702, 2381, 2909, 6732, 3098, 2119, 2146,
    ],
  }}
  groupBy="Month"
  measures="Sales Target"
  onOptionChange={(option) => {
    if (Array.isArray(option.yAxis) && option.yAxis.length === 1) {
      option.yAxis = [{ ...option.yAxis[0], splitNumber: 8 }];
    }
    option.series[0].markLine = {
      data: [{ yAxis: 3000, name: "Average" }],
      symbol: "none",
      itemStyle: {
        color: "#666",
      },
      label: {
        color: "#666",
      },
    };
    option.series[0].smooth = true;
    option.series[0].lineStyle = {
      color: "#999",
    };
    option.series[0].itemStyle = {
      color(params: any) {
        return params.data[1] > 3000 ? "#090" : "#900";
      },
    };


    option.series[0].symbolSize = 8;


    return option;
  }}
/>

<HvLineChart
  height={400}
  data={{
    Month: [
      "Jan",
      "Feb",
      "Mar",
      "Apr",
      "May",
      "Jun",
      "Jul",
      "Aug",
      "Sep",
      "Oct",
      "Nov",
      "Dec",
    ],
    "Sales Target": [
      5929, 2393, 1590, 7817, 4749, 1702, 2381, 2909, 6732, 3098, 2119, 2146,
    ],
  }}
  groupBy="Month"
  measures="Sales Target"
  onOptionChange={(option) => {
    if (Array.isArray(option.yAxis) && option.yAxis.length === 1) {
      option.yAxis = [{ ...option.yAxis[0], splitNumber: 8 }];
    }
    option.series[0].markLine = {
      data: [{ yAxis: 3000, name: "Average" }],
      symbol: "none",
      itemStyle: {
        color: "#666",
      },
      label: {
        color: "#666",
      },
    };
    option.series[0].smooth = true;
    option.series[0].lineStyle = {
      color: "#999",
    };
    option.series[0].itemStyle = {
      color(params: any) {
        return params.data[1] > 3000 ? "#090" : "#900";
      },
    };

    option.series[0].symbolSize = 8;

    return option;
  }}
/>

Heatmap Scatter Plot