Radar Chart Visualizing Yearly Activities
Radar charts are great for creating stunning multi-level visualizations in a fairly compact space. This demo shows a year’s worth of daily bicycle ride data together with weekly totals, and a grand total in the same colorful interactive radial diagram.
Key implementation details
We create a date axis for the whole year as our X axis (circular outer axis), then add a couple of Y axes: the inner one for weekly distances and the outer one for weekdays. Weekly distances are represented by column series bound to the the inner distances axis. Finally, we add line series where bullet sizes represent distances cycled on specific weekdays and “attach” it to the weekday Y-axis.