Radar Charts

Radar charts display multivariate data on axes that radiate from a common center. They are commonly used to compare patterns across several dimensions, such as revenue, cost, performance, or evaluation metrics.

SpreadJS supports two radar-based chart types: Radar and Filled Radar.

Note: All samples in this topic use the Sales table introduced in the Create Data Charts topic. Ensure that the data source has been configured before adding a chart.

Radar Chart

A radar chart connects data points across multiple radial axes to form a polygon, making it useful for comparing value distributions across dimensions.

Radar chart

Refer to the following sample code to add a radar chart.

// Radar Chart
const sheet = spread.getActiveSheet();
sheet.name("Radar Chart");
const dataChart = sheet.dataCharts.add('data-chart', 10, 10, 600, 400);
dataChart.setChartConfig({
    tableName: 'Sales',
    config: {
        header: {
            title: "Radar Chart"
        }
    },
    plots: [
        {
            type: GC.Spread.Sheets.DataCharts.DataChartType.radar,
            encodings: {
                values: [
                    {
                        field: "Sales",
                        aggregate: GC.Spread.Sheets.DataCharts.Aggregate.sum
                    }
                ],
                category: {
                    field: "Salesman"
                },
                color: {
                    field: "Product"
                },
                filter: {
                    operate: GC.Spread.Sheets.DataCharts.LogicalOperation.and,
                    conditions: [
                        {
                            field: "Region",
                            excludeMatched: false,
                            operate: GC.Spread.Sheets.DataCharts.ComparisonOperator.in,
                            value: ["East"]
                        }
                    ]
                }
            }
        }
    ]
});

Filled Radar Chart

A filled radar chart shades the area enclosed by the plotted values, making it easier to compare overall magnitude and relative distribution.

Refer to the following sample code to add a filled radar chart.

// Filled Radar Chart
const sheet = spread.getActiveSheet();
sheet.name("Filled Radar Chart");
const dataChart2 = sheet.dataCharts.add('data-chart-2', 10, 10, 600, 400);
dataChart2.setChartConfig({
     tableName: 'Sales',
     config: {
         header: {
             title: "Filled Radar Chart"
         },
     },
     plots: [
         {
             type: GC.Spread.Sheets.DataCharts.DataChartType.filledRadar,
             encodings: {
                 values: [
                     {
                         field: "Sales",
                         aggregate: GC.Spread.Sheets.DataCharts.Aggregate.sum
                     }
                 ],
                 category: {
                     field: "Salesman"
                 },
                 color: {
                     field: "Product"
                 },
                 filter: {
                     operate: GC.Spread.Sheets.DataCharts.LogicalOperation.and,
                     conditions: [
                         {
                             field: "Region",
                             excludeMatched: false,
                             operate: GC.Spread.Sheets.DataCharts.ComparisonOperator.in,
                             value: ["East"]
                         }
                     ]
                 }
             },
         }
     ]
});

Line Aspect

Radar and Filled Radar charts support the lineAspect property to control how data points are connected around the radial axis.

Data Type	Default	Spline
Radar
Filled Radar

If lineAspect is set to null or undefined, the chart renders using the Default behavior.

Example

config: {
  lineAspect: GC.Spread.Sheets.DataCharts.LineAspect.Spline
}