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AKA 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.
Pie chart
Perhaps the most well-known representation of data slices are 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:
type: 'percentage'
Limiting the slices
When there are too many to make sense
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