Also called Sliced Diagrams
Another family of charts, the aggregation charts accumulate the value at a data point across the multiple datasets.
The data format stays the same, with single or multi datasets.
Perhaps the most well-known representation of data slices are Pie charts:
Donut chart is a variant for Pie charts:
Percentage Charts FTW
Pies have received some criticism for data perception; we are much better at parsing sizes in a single dimension rather than an area. That's why, the much leaner
percentage chart can come in handy:
Limiting the slices
When there are too many data values to show visually, it makes sense to bundle up the least of the values as a cumulated data point, rather than showing tiny slices. This can be done by defining the maximum number of slices to be shown.
Configuring percentage bars
Some attributes of a percentage bar can be redefined; like its height and the depth of it's shadow.
height: 15, // default: 20