« Radar charts, Ripleyesque replies, and straight-ticket votes | Main | The scatter-plot matrix: a great tool »



One can stare at the orange and green arcs for however long, but can one tell the orange is shorter than the green by 3.3 million?

One can stare at the orange and green arcs for a few seconds, and realize that the data is represented by the areas and not by the arc lenghts (if it was the case, the radius of the orange circle would be around two thirds of the green one). The radius of the yellow circle (31) is about twice the radius of the orange one (7.7), and the value represented is about four times as big (7.7*4=30.8).

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.


Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)


Link to Principal Analytics Prep

See our curriculum, instructors. Apply.
Marketing analytics and data visualization expert. Author and Speaker. Currently at Columbia. See my full bio.

Book Blog

Link to junkcharts

Graphics design by Amanda Lee

The Read

Good Books

Keep in Touch

follow me on Twitter