Radar chart

A small number of profiles across shared bounded dimensions.

Purpose: Compare a small number of profiles across the same bounded dimensions.
Use when: Use when shared dimensions and overall profile shape help readers spot broad strengths and gaps.
Avoid when: Avoid when precise values or more than a few profiles must be compared; aligned bars or a table are clearer.
Equivalent data: Keep indicator maxima and every series value in adjacent text or a table; shape and color alone are not equivalent data.

Default Rendered example

Allocated budget and actual spending across six shared dimensions.

Exact values

Series	Sales (max 6500)	Administration (max 16000)	Information Technology (max 30000)	Customer Support (max 38000)	Development (max 52000)	Marketing (max 25000)
Allocated Budget	4200	3000	20000	35000	50000	18000
Actual Spending	5000	14000	28000	26000	42000	21000

Usage Example

@radar.Radar(radar.Config{
  Label: "Basic radar chart",
  Indicators: []radar.Indicator{
    {Name: "Sales", Max: 6500},
    {Name: "Administration", Max: 16000},
    {Name: "Information Technology", Max: 30000},
    {Name: "Customer Support", Max: 38000},
    {Name: "Development", Max: 52000},
    {Name: "Marketing", Max: 25000},
  },
  Series: []radar.Series{
    {Name: "Allocated Budget", Values: []float64{4200, 3000, 20000, 35000, 50000, 18000}},
    {Name: "Actual Spending", Values: []float64{5000, 14000, 28000, 26000, 42000, 21000}},
  },
  Title: radar.TitleOptions{Text: "Basic Radar Chart", FontSize: 16},
  Legend: radar.LegendOptions{Horizontal: radar.PlacementEnd},
  Width: 600, Height: 400,
})

Readable values and compact layout

The same profiles demonstrate typed dimension minimums, indicator labels, compact vertex formatting on one profile, logical title and legend placement, padding, and caller colors without changing the values.

Readable values and compact layout Rendered example

The same budget comparison uses typed labels, compact formatting, logical placement, and caller colors.

Exact values

Series	Sales (min 1000, max 6500)	Administration (max 16000)	Information Technology (max 30000)	Customer Support (max 38000)	Development (max 52000)	Marketing (max 25000)
Allocated Budget	4200	3000	20000	35000	50000	18000
Actual Spending	5000	14000	28000	26000	42000	21000

Readable values and compact layout

cfg := sampleBasicRadar()
cfg.Label = "Readable radar values and compact layout"
cfg.Caption = "The same budget comparison uses typed labels, compact formatting, logical placement, and caller colors."
cfg.Indicators[0].Min = 1000
for index := range cfg.Indicators {
  cfg.Indicators[index].Label.FontSize = 10
}
cfg.Options = radar.Options{
  RadiusPercent: 44,
  ValueLabels: radar.ValueLabelsShown,
  ValueFormat: radar.ValueFormatHumanized,
}
cfg.Series[0].Options.LabelFontSize = 9
cfg.Series[1].Options = radar.SeriesOptions{
  ValueLabels: radar.ValueLabelsHidden,
  ValueFormat: radar.ValueFormatInteger,
}
cfg.Title = radar.TitleOptions{
  Text: "Basic Radar Chart", Subtext: "Values at each vertex",
  Horizontal: radar.PlacementCenter, FontSize: 16, SubtextFontSize: 12,
}
cfg.Legend = radar.LegendOptions{
  Orientation: radar.LegendVertical, Horizontal: radar.PlacementEnd,
  Alignment: radar.AlignmentEnd, FontSize: 10, Overlay: true,
}
cfg.Padding = radar.Padding{Top: 24, Right: 84, Bottom: 24, Left: 24}
cfg.Style = charttheme.Style{
  Palette: charttheme.PaletteAraiHu,
  Colors: []string{"#365314", "#c2410c"},
  Class: "radar-explicit-override",
}
cfg.Export = &chartcontrol.ExportOptions{
  Filename: "readable-radar-values",
  Background: chartcontrol.ExportBackgroundTransparent,
}
@radar.Radar(cfg)

Static/vector behavior

Radar renders inline SVG on the server, follows Goshtoso and AraiHu tokens in light and dark mode, stays readable in print and in no-JavaScript delivery, and provides resolved SVG plus opaque or transparent PNG download through the shared wrapper. Read shared chart controls and chart modes guides for lifecycle, export, client events, and the capability differences between static/vector and interactive charts.

Go API

v0.0.1

The examples above cover behavior and composition. pkg.go.dev is the canonical reference for exported types, functions, methods, and Go documentation.

github.com/araihu/goshtoso-charts/components/radar

Enabled, disabled, hidden, and omitted wrapper behavior, controls, export, and client transitions are shared by every chart. Review chart controls, then compare static/vector and interactive capabilities.

Open v0.0.1 API