Donut charts are a useful way to present data and show proportions. They are the same in this manner as pie charts, but have the center removed, which helps to focus attention on the length of the arc segments. This can make it easier to identify which sections are smaller or larger. Both pie and donut charts make the part-to-whole relationship easy to understand.
In Harmoni, the donut chart is available in two forms; a donut, and a semi donut.
In this article
- Donut Graph
- Semi Donut Graph
- Display Settings
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.
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%
If two variables are in Down and Across and a donut chart is selected, a warning is displayed
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 will display 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.
A warning will show if you select more than one variable, down and across. Donut graphs display one variable at a time.
Table and Share Percentages
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 will show in brackets, e.g. (10.05%), next to the share percentages.
If an axis that does not add to 100% or a selection of elements available is selected (and therefore do not add to 100%), share percentages will differ from the table percentages.
When creating the table for your donut graph, 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.
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.
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.