# Polar area

> Parts as wedges, sized by their value. Sample data: new trial signups by channel, organic 4.2K (30%), events 0.6K (4%).

- Type 019 · Part of a whole
- Component: `<PolarArea>`, the same name as the Figma component
- Install: `npx shadcn add @chartory/polar-area` (free in Hearth: the public registry, no token; Signal with Code and Complete)
- Type page: https://usechartory.com/charts/polar-area

## Installation

1. **Set up the registry once.** This chart is free in Hearth and MIT licensed: no token. Add @chartory to components.json once (the URL alone, no headers), or skip this when another chart is already installed. [Installation guide](https://usechartory.com/docs/installation)

2. **Add the chart.** One command adds the Polar area component to your project.

```bash
npx shadcn add @chartory/polar-area
```

3. **Use it.** Pass your rows. The props are the Figma properties.

usage.tsx:

```tsx
import { PolarArea }
  from "@/components/chartory/polar-area"

<PolarArea
  data={signupsByChannel}
  size="m"
/>
```

## Props

### `<PolarArea>`

Every prop but data is a Figma property with the same name and values.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| data | PolarAreaData | Required | The chart's data. The tables below list every field. |
| size | "xs" \| "s" \| "m" \| "l" | "m" | The size class. Each one is laid out again from the data. |

### PolarAreaData

The data prop: one object for the whole chart.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| items | PolarAreaItem[] | Required | One entry per item. |

### PolarAreaItem

One object per entry in items.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| label | string | Required | The name shown on the chart. |
| v | number | Required | The value. |
| tok | string | Required | The colour token, e.g. "data/primary". |
| text | string | Required | The label as shown. |
| pct? | string | — | The share as shown, e.g. "42%". |

## Polar area chart: a React and Figma chart in four sizes

### What does a polar area chart show?

A polar area chart gives each part an equal wedge and stretches it out by its value, so big and small parts show as long and short petals. Use it for channels or categories when the shape of the mix matters more than exact shares.

Chartory ships it as a Figma component and a React component with the same name. The code installs from the shadcn registry with one command and lands in your project as a file you own.

### What is the Polar area component?

It is one **<PolarArea>** component. Its props are the Figma properties with the same names and values, and the props table above lists them. The data is four to eight parts with a value.

Sizes **XS**, **S**, **M** and **L** re-lay the chart out from the data instead of scaling it, so labels stay readable at every size.

### When should I use it?

- **Is the shape more important than exact shares?** Yes means the polar area fits.
- **Are there four to eight parts?** Yes means the polar area fits.
- **Is it one moment?** Yes means the polar area fits.

### When does another type fit better?

- **Exact shares matter.** Use Donut instead.
- **Many parts.** Use Treemap instead.
- **The mix over a year.** Use Streamgraph instead.

## Polar area questions

### Does the Polar area chart work with shadcn/ui?

Yes. It installs through the shadcn registry with the shadcn CLI, and the file lands in your project.

### How do I install it?

It is free in Hearth and MIT licensed: add the @chartory registry URL once, no token, then run npx shadcn add @chartory/polar-area. The Installation guide has the steps.

### Can my coding agent install it?

Yes. Connect the Chartory MCP server and ask for the polar area chart; the agent runs the same command and you review the diff.

### What data does it expect?

Four to eight parts with a value. The sample data comes with the component, and the props table lists every field.

### Which sizes does it ship in?

XS, S, M and L, in Figma and in code. Each size is laid out again from the data, so text and lines keep their size.

### Is it in the Figma file too?

Yes. chart/019-polar-area has the same properties as the component.

### Does it follow light and dark mode?

Yes. Every paint is a token, so the chart follows light and dark mode and the collection you pick.

### Which plan has the code?

None for Hearth: it is free in the public registry, no token. The Signal collection (@chartory/signal) comes with Code and Complete.