Circular Data Charts

Polar bar chart

A polar bar chart places categories around an angular axis and shows values along a radial axis. A circular arrangement can suit repeating categories such as weekdays or hours, but a circle alone does not mean the data are directional or cyclical.

When it helps

Use it when the circular ordering contributes to the explanation. For unrelated categories or small value differences, straight bars usually make magnitude comparisons easier.

What to check

1. Explain the angle. State whether position means a category, a time, or a measured direction.
2. Keep category order stable. Preserve weekday or month order rather than sorting it by value.
3. Label the radial unit. Readers need to know whether distance represents counts, hours, or another measure.
4. Use a consistent baseline. An inner hole must not obscure where the value scale begins.
5. Limit decoration. Avoid visual effects that make equal values appear unequal.

Build it with MyMap

MyMap can arrange the categories and values you supply into a circular chart. The example uses a polar bar layout for website traffic by weekday, with values labeled in thousands. Ask for revisions to the ordering or labeling after checking the numbers.