Donut charts in Harmoni show part-to-whole data proportions, much like pie charts, but with a hollow center removed to highlight the arc lengths. In Harmoni, you can choose a full or semi donut chart, both showing categories that add up to 100%.
Drag an item into the down or across drop zone, you can easily compare which sections are smaller or larger. A cross-tab analysis creates a nested chart with multiple data levels. You can redraw the chart by adding decimals or merging segments. Since percentages total 100%, you can add data labels (R) from the modify menu.
In this article
1. Donut Graph
Donut graphs make it easy to see the overall proportions in categorical data. Often used to visualize election results, market share, and demographic data (to name a few), donuts are suitable for displaying data from one variable in either the Down or Across drop zones.
Important Features:
- When donut graphs display data, the segments always add to 100%
- The percentages displayed on the graph are share percentages
- If the axis does not add to 100% or a selection of elements is made, Harmoni rebases the percentages so that they add to 100%
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Note: When you add more than one variable in the same drop zone, all items are combined to compare their distribution as a percentage of the combined total
2. Semi Donut Graph
As with donut graphs, semi donut graphs display data that add to 100%. Instead of the full circle display, semi donuts use half the circle. They work in the same manner as donut graphs.
3. Display Settings
Down Drop Zone
Selecting a donut or semi donut graph when an axis is in the Down drop zone displays the labels in a legend and a range of colors identify the segments.
Across Drop Zone
Selecting a donut or semi donut graph when an axis is in the Across drop zone displays the labels next to the graph. A single hue with varying shades identifies the segments.
Multi-level Graph
Multi-level donut and semi-donut graphs, also known as nested charts, are used to visualize hierarchical relationships. The size of each segment reflects its proportion to its parent category.
The central circle represents the main element's proportion, and an outer ring is placed around it to show the breakdown of each segment.
To create a multi-level graph, drag a variable into the Down Analysis Zone to form the central circle. Then, drag another variable into the Across Zone, which breaks down the first variable into segments. This outer ring shows the detailed composition of each segment, providing insights into how different elements relate within a hierarchy.
Table and Share Percentages
The purpose of a donut or semi-donut chart is to display the proportional share of each element with a total of 100%. If a chart is created from an axis that does not add to 100% or a subset of elements within the axis are selected, then share percentages that are displayed in the chart differ from the table percentages. Single response axes display the same percentages in the table and chart (as long as all elements are selected), while multiple response axes recalculate to show the share percentage.
To show the table percentages on a donut graph, visualize the graph, then from the modify menu, select the show/hide table result icon (R). Table percentages are displayed in brackets next to the share percentages, e.g. 17% (65%).
Rank
When creating the table for your donut graph, prior to charting the items, select the column or row to rank and select rank from the modify menu. The segments in the donut are ordered from highest to lowest. Click rank again to reverse the order. Once you have ranked the data as required, choose your graph type from the visualize menu.
Redraw
As with pie graphs, you can group elements with smaller percentages together as Others to remove the clutter on the graph. Donut graphs are more effective with a smaller number of segments.
- Create a ranked analysis and visualize as a Donut graph
- Click the drop-down menu and enter a percentage in the REDRAW box
- Click REDRAW or press enter to update the chart
Decimal Places
Change the number of decimal places showing in the share percentages by clicking the drop down menu under the percentage symbol below the table header.
You can control the number of decimal places in the table percentage (R) by using the drop down menu under the % calculation type in the modify menu.