This makes your comparison analysis much more manageable. That said, it works best when you have data items with varied values. Here are some of the most popular uses of a Radial Bar Chart.Ĭomparing data with varied values: First and foremost, the Radial Bar Chart is a comparison diagram. This means the Radial Bar Chart also has many uses, making it a highly valuable option for depicting your data.
When Do You Use a Radial Bar Chart?Ĭircular graphs and bar charts are two of the most versatile and universal visualization options.
#BAR CHARTS MAKER FULL#
If your data is not reflective of percentages, a label can designate what a full bar equals. How full the bar is in your plot demonstrates how complete the progress is. Each circular bar’s total reflects a 100% value. So, if your inner curved bar is 50% full and the outermost one is 33% full, the center bar’s value is higher, even though it may be physically smaller due to how you arrange your concentric circles chart.Īnother way to think of the Radial Bar Chart is as a circular progress bar. What you want to compare is the proportion of how filled each bar appears.
However, each bar’s total maximum value is proportional. When reading a Radial Bar Chart, it is crucial to realize that the physical size of each bar changes based on its position in the circular plot.įor example, the unique design of the Radial Bar Chart means that the innermost circle is physically smaller than the most external ring. Otherwise, the visualization becomes too overwhelming, making it challenging to draw meaningful comparisons. As a rule of thumb, it is best to limit your Radial Bar Chart to 5-7 items maximum. The number of circular bars represents how many data categories you are measuring. Viewers can compare the length of each curved bar to draw insights from the chart. This gives the bars the curved shape that the Radial Bar Chart is known for using.Įach circular bar is layered, forming a concentric circles chart. It is essentially a bar chart visualized using a polar coordinate system, instead of a Cartesian plot. Radial Bar Chart DefinitionĪ Radial Bar Chart goes by several names - circular bar graph, radial column chart and curved bar chart. He believed the circular shape made it easier for the eyes to make comparisons and see the magnitude of each item.Īfter these early bar charts and circular graphs, it’d take some time for someone to combine the two and form the Radial Bar Chart. Playfair’s noteworthy circular graph showed the sizes of geopolitical territories. The circular graph appeared in Playfair’s The Statistical Breviary, showing right alongside another one of his earliest bar charts. After all, he is the father of statistical graphs!
Interestingly enough, history also credits Playfair with one of the first circular graphs. On the other hand, Priestley used bars only to depict data along a timeline.
The difference between the two designs is that Playfair intended to compare data sets with his bar chart. For instance, engineers used “proto bar charts” to visualize the velocity of an object over time.Īnother inspiration of Playfair was Joseph Priestley’s 1765 timeline chart. However, Playfair drew inspiration for his early bar chart from other work. His bar chart showed exports and imports of Scotland over a year. Playfair published his work in The Commercial and Political Atlas. Playfair gets credit for most early chart types and is widely considered the founder of graphical methods statistics. The credit for the first bar chart often goes to William Playfair. So, you could make the argument that the origins of the Radial Bar Chart match the introduction of these charts into the lexicon of different chart types. Tracking the history of the Radial Bar Chart isn’t very easy because this visualization is really the merger of two different chart types: circular graphs and bar charts.
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