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← Visualization

Treemap

Nested rectangles allocate area to parts of a hierarchy.

Evening class registrations

Evening class registrations: treemap. Registrations. Full values follow in the data view.6 observations. Use the data view for exact values.StudioClay 48Print 32Photo 40KitchenBread 36Pasta 28Ferment 16
Illustrative data
View data6 records
Evening class registrations
ItemGroupRegistrations
ClayStudio48
PrintStudio32
PhotoStudio40
BreadKitchen36
PastaKitchen28
FermentKitchen16

When it fits

See large and small contributors within grouped totals.

What you need

A hierarchy with nonnegative values at its leaves.

Watch for

Similar rectangle areas are harder to compare than aligned lengths.

In practice

The Flare software hierarchy, published by Vega contributors.
The Flare software hierarchy · Vega contributors · BSD-3-Clause

Related alternatives

Tree diagram Bar chart Donut chart
Sources and accessibility

The authored example uses illustrative data. Published references retain their original information and presentation.

Use Tab to reach controls and the data view. Native selects support arrow keys. All values are available in the data view; color and hover are never the only way to read the example.