Rose chart

Use a rose chart for a cycle, such as months of a year, where the shape around the circle matters.

Rain peaks in July

Rainfall per month

This chart cannot be displayed here: it needs JavaScript and WebGL.

Wedge radius is proportional to the value, so area grows with its square

The same chart in each style

Source

Open in playground

Rich Markdown

```chart
type: rose
title: Rain peaks in July
subtitle: Rainfall per month
data:
  inline:
    - { month: Jan, mm: 30 }
    - { month: Feb, mm: 25 }
    - { month: Mar, mm: 40 }
    - { month: Apr, mm: 55 }
    - { month: May, mm: 80 }
    - { month: Jun, mm: 95 }
    - { month: Jul, mm: 110 }
    - { month: Aug, mm: 100 }
    - { month: Sep, mm: 70 }
    - { month: Oct, mm: 50 }
    - { month: Nov, mm: 45 }
    - { month: Dec, mm: 35 }
encoding: {x: month, y: mm}
axes:
  y: {label: Rainfall (mm)}
```

Fields that matter

type: rose with encoding.x for the category and encoding.y for its value
Wedges run clockwise from 12 o’clock in source order, and the radius grows linearly from a zero centre
style.scale: area makes the wedge area proportional to the value instead, and the chart says which it drew
encoding.color splits each category into groups side by side inside its sector, with a legend
axes.y sets label, format, unit and max; encoding.facet makes one rose per value and style.facet_scale: free gives each its own scale

Interactions

Hover or focus a wedge to read its category and value.
Open the Table view, Download PNG or CSV, or Expand the chart.