Figure 1. Example of a compound bar chart
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A compound bar-chart (also known as a stacked bar-chart (Wilkinson, 2005, p. 157) or component bar chart (Zedeck, 2014, p. 54)) is similar as a clustered bar-chart, but instead of placing the bars next to each other, they are placed on top of each other.
| compound bar-chart a bar chart showing multiple bars stacked at each x-axis category, each representing a value of the stacking variable (Upton & Cook, 2014, p. 88). |
As with the cross-table and the clustered bar-chart there are three options to use if you want to show percentages. We can either choose percentages based on the grand total, based on the stacked variable, or based on the variable on the horizontal axis. Usually I use the stacked variable (which is often a binned scale or ordinal variable) option, as shown inFigure 1.
Figure 1. Example of a compound bar chart