A radar chart is a graphical method of displaying multivariate data in the form of a two-dimensional chart of three or more quantitative variables represented on axes starting from the same point. The relative position and angle of the axes is typically uninformative.
Andy Kriebel shared this video:
Andy’s accompanying blog post is here:
The Information Lab posted a three part series, with Part One linked below, and the subsequent parts easily accessible therafter:
Tableau.com hosts this great guest article by Jonathan Trajkovic:
And Jonathan Trajkovic’s example is also downloadable: