How do I create a circos spiral chart in JavaScript?

Install with `npm install katucharts.js`, import the module with `import 'katucharts.js/bio';`, then call KatuCharts.chart(container, { chart: { type: 'circosspiral' }, series: [...] }).

Why does my circos spiral chart render as a line chart?

The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type " ", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.

Why do I get "Cannot read properties of null (reading 'appendChild')"?

The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.

Why is the chart rendering with zero height?

The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.

Bioinformatics · katucharts.js/bio

Circos Spiral

type: 'circosspiral'

Values rendered along an Archimedean spiral, one revolution per period — surfaces seasonality and long-range trends a flat axis would hide.

Edit the JSON on the right and press Run (or ⌘/Ctrl + Enter) — data, titles, categories and colors all update live.

Live

Circos Spiral

Edit · JSON

{
  "chart": {
    "type": "circosSpiral"
  },
  "title": {
    "text": "Seasonal Cycles"
  },
  "series": [
    {
      "name": "Cycles",
      "data": [
        {
          "custom": {
            "values": [
              50,
              69,
              83.7,
              91,
              89.7,
              66,
              53,
              40,
              31.3,
              30,
              22.3,
              37,
              56,
              75,
              89.7,
              82,
              80.7,
              72,
              59,
              46,
              22.3,
              21,
              28.3,
              43,
              62,
              66,
              80.7,
              88,
              86.7,
              78,
              50,
              37,
              28.3,
              27,
              34.3,
              34,
              53,
              72,
              86.7,
              94,
              77.7,
              69,
              56,
              43,
              34.3,
              18,
              25.3,
              40
            ],
            "period": "year",
            "colorScale": "Viridis",
            "showLabels": false
          }
        }
      ]
    }
  ]
}

Data format

custom: { values: [...] | [{ date, value }], period }

Data shape

The JSON you pass inside the chart — drop it straight into your series.

data: [{
  custom: {
    values: [12, 19, 24, 31, 28, 22, 18, 15, 14, 16, 20, 25],
    period: 'month'
  }
}]

Example

KatuCharts.chart('container', {
  series: [{ type: 'circosSpiral', data: [{ custom: {
    values: [12, 19, 24, 31, 28, 22],
    period: 'year', colorScale: 'Viridis'
  } }] }]
});

Type-specific options

Option	Description
`period`	'hour' \| 'day' \| 'week' \| 'month' \| 'year'.
`colorScale`	Named sequential scale (e.g. 'Viridis').
`showLabels`	Toggle the period labels.

Common errors

Why does my circos spiral chart render as a line chart?: The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.
Why do I get "Cannot read properties of null (reading 'appendChild')"?: The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.
Why is the chart rendering with zero height?: The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.

FAQ

How do I create a circos spiral chart in JavaScript?: Install with `npm install katucharts.js`, import the module with `import 'katucharts.js/bio';`, then call KatuCharts.chart(container, { chart: { type: 'circosspiral' }, series: [...] }).
Why does my circos spiral chart render as a line chart?: The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.
Why do I get "Cannot read properties of null (reading 'appendChild')"?: The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.
Why is the chart rendering with zero height?: The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.

Common options (color, visible, marker, dataLabels, animation, events, zones…) apply to every type — see Configuration → series. See it rendered in the gallery.