A treemap shows your data organized into dimension hierarchies. For example, you can use a treemap to show the average annual sales of each item in a product category > subcategory > product hierarchy.
Treemaps in Looker Studio
Data in a treemap is displayed in "branches" (also called "nodes"). Each branch can have zero or more sub-branches, and one parent branch (except for the root, which has no parents). Each branch is displayed as a rectangle, sized and colored according to the values in your data. Sizes and colors are valued relative to all other branches in the graph.
Treemaps are a good hypothesis-generation tool because they can help expose the relative importance of, and the relationship between, different entities.
Treemap examples
The treemap below displays the number of items sold by an online pet store. The branch labels come from the Department ("Department") and Item ("Item") dimensions.
Here's how the underlying data for this chart is organized:
Configure the chart
Add a new chart or select an existing chart. Then, on the right, use the Properties panel to configure the chart's Setup and Style tab properties.
Set up the chart data
The options in the Setup tab of the Properties panel determine how the chart's data is organized and displayed.
Data source
A data source provides the connection between the component and the underlying dataset.
- To change the chart's data source, click the current data source name.
- To view or edit the data source, click
. (You must have at least Viewer permission to see this icon.)
- Click +BLEND DATA to see data from multiple data sources in the same chart. Learn more about data blending.
. (You must have at least Default date range
The Default date range property lets you set a timeframe for an individual chart.
Default date range options
| Auto | Uses the default date range, which is determined by the chart's data source. |
| Custom | Lets you use the calendar widget to select a custom date range for the chart. |
| Date compare type | Displays comparison data for the selected time period. |
Dimension
Dimensions are data categories. Dimension values (the data that is contained by the dimension) are names, descriptions, or other characteristics of a category.
Drill down
This option appears on charts that support it.
Drilling down gives viewers a way to reveal additional levels of detail within a chart. When you turn on the Drill down option, each dimension that you add becomes another level of detail that you can drill into. Learn more about chart drill down.
Levels to show
The Levels to show option determines the granularity of the chart. For example, the sample chart above has Levels to show set to 2, causing it to show two levels of detail (Department and Item).
Setting Levels to show to 1 causes the chart to display only one level of detail (Department):
What's the difference between drill down and levels to show?
Drill down lets you focus on a specific level of detail, while Levels to show controls how many levels of detail appear in the treemap. For example, here's the result of drilling down into the chart above. Note that it now displays only one level of detail, but that level is now the Item level.
See an example of a treemap with drill down turned on (Note: the report is in English only).
Metric
Metrics measure the things that are contained in dimensions and provide the numeric scale and data series for the chart.
Metrics are aggregations that come from the underlying data set or that are the result of implicitly or explicitly applying an aggregation function, such as COUNT(), SUM(), or AVG(). The metric itself has no defined set of values, so you can’t group by a metric as you can with a dimension.
Optional metrics
Define a list of additional metrics that can be displayed by the chart or table. Learn more about optional metrics.
Metric sliders
Let report users filter the chart or table by metric values. Learn more about metric sliders.
Total rows
Treemaps can display from 5 to 5000 rows of data.
Filter
Filters restrict the data that is displayed in the component by including or excluding the values that you specify. Learn more about the filter property.
Filter options
| Filter name | Click an existing filter to edit it. Mouse over the filter name and click X to delete it. |
| +Add a filter | Click this option to create a new filter for the chart. |
Chart interactions
When the Cross-filtering option is enabled on a chart, that chart acts like a filter control. You can filter the report by clicking or brushing your mouse across the chart. Learn more about cross-filtering.
Stylize the chart
The options in the Style tab control the overall presentation and appearance of the chart.
Title
If you select the Show title checkbox, you can add a title and customize its appearance and placement on the chart.
Title options
| Title | Provides a text field where report editors can enter a custom title for the chart. |
|
Title font type |
Sets the font type for the title text. |
| Title font size | Sets the font size for the title text. |
| Font styling options | Applies bold, italic, or underline styling to the title text. |
| Title font color | Sets the font color for the title text. |
| Left | Aligns the chart title to the left side of the chart. |
| Center |
Aligns the chart title to the right side of the chart. |
| Right | Centers the chart title above or below the chart. |
| Top | Positions the chart title at the top of the chart. |
| Bottom | Positions the chart title at the bottom of the chart. |
Treemap
| Max color value | Set the color for the highest metric value. |
| Mid color value | Set the color for the median metric value. |
| Min color value | Set the color for the minimum metric value. |
| Show branch header | Show or hide the parent branches. |
| Show scale | Show or hide the chart scale, which appears above the treemap. To see the scale in action, hover over different branches in the chart. |
Text
Set the font color, font size, and font family for text in the chart.
Background and border
These options control the appearance of the chart background container.
| Background | Sets the chart background color. |
| Border Radius | Adds rounded borders to the chart background. When the radius is 0, the background shape has 90° corners. A border radius of 100° produces a circular shape. |
| Opacity | Sets the chart opacity. 100% opacity completely hides objects behind the chart. 0% opacity makes the chart invisible. |
| Border Color | Sets the chart border color. |
| Border Weight | Sets the chart border line thickness. |
| Border Style | Sets the chart border line style. |
| Add border shadow | Adds a shadow to the chart's lower and right borders. |
Chart header
The chart header lets viewers perform various actions on the chart, such as exporting the data, drilling up or down, or sorting the chart. Chart header options are as follows:
| Show on hover (default) | Three vertical dots appear when you mouse over the chart header. Click these to access the header options. |
| Always show | The header options always appear. |
| Do not show | The header options never appear. Note that report viewers can always access the options by right-clicking the chart. |
| Color | Sets the color of the chart header options. |