Pie chart

Use a pie chart for the share each of a few categories contributes to a whole.

Where the engineering hour goes

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

The same chart in each style

Source

Rich Markdown

```chart
type: pie
title: Where the engineering hour goes
data:
  inline:
    - { activity: coding, hours: 3.1 }
    - { activity: review, hours: 1.4 }
    - { activity: meetings, hours: 1.8 }
    - { activity: ops, hours: 0.9 }
encoding: { x: activity, y: hours }
```

Fields that matter

type: pie with encoding.x for the category name and encoding.y for the value
Slices follow the order of the rows; past eight slices the palette repeats and richview check warns (chart.series-differentiation), so merge small categories first
style.ratio defaults to 1:1
Labels sit around the disk when names and percentages fit; otherwise a wrapped key is used
chart.decals in a style adds hatch patterns for slices and key swatches

Interactions

Hover or focus a slice, or a key entry, to read its value; the slice moves outward and the others dim.
Tiny and zero shares stay inspectable through the key.
Open the Table view, Download PNG or CSV, or Expand the chart.