I really wanted to make a radial bar chart, and as I have parsed some data from my Health App already, I was (quite) ready to go for those visualisations.
It’s some high school math and geometry I don’t remember anymore, but you don’t even have to know what’s happening as long as you follow the right YouTube tutorials to a T.
Radial Bar Charts
Longer rays and smaller inner radius of a radial bar chart can look a bit neater. Picking the right colour adds a lot as well. You can follow the YouTube tutorial here.
Radial Pie Gauge Chart
Probably the most tricky part of making this kind of chart is preparing and ranking your data. But you get a chart looking like an Apple Watch activity circles! Tutorial to follow.
The difference between Activity Rings and Gauge Chart is that the rings are meant to get closed, your pseudo-rings in Gauge Chart are not. A gauge is an instrument for displaying certain dimensional information (thanks, Wikipedia!) and when used as a chart in Tableau, the length of the individual segments show the proportion ratio between the values of the longest section (always three quarters) and values of the others.
My gauge chart shows how many days were my happy “you made at least 10k steps today!” days. In 2018, I actually tried to do that as often as possible and one third is what I got. (I haven’t decided yet whether it’s a good or a bad result.)