Guide
Pie chart is one of the four visualisation types for Reports.
A pie chart (or a circle chart) is a circular statistical graphic, which is divided into slices to illustrate numerical proportion.
Statisticians generally regard pie charts as a poor method of displaying information, and they are uncommon in scientific literature. One reason for this is that it is more difficult for comparisons to be made between the size of items in a chart when area is used instead of length and when different items are shown as different shapes.
For Charts, the visualisation pane looks like this:
Parameters
There are three parameters available for a pie chart visualisation: value, color and multiple pies.
The value parameter must be a number type field (or a calculation that results in a number), and it determines the relative size of each wedge in the pie.
The color parameter determines how the pie will be split, i.e. what each wedge should represent. It should be a calculation that results in multiple possible options.
You can choose whether or not the value or color parameters are shown on the wedges.
Multiple pies allows you to break the data into separate pies, according to the value of this parameter.
Data review
You can review the data on which the pie chart(s) has (have) been built by clicking on the Chart data button, adjacent to the Filter button in the top right of the report.
You can also see the raw data by hovering over a chart, and from here you can export the source data to CSV.