Radar chart

Example star plot from NASA, with some of the most desirable design results represented in the center
This spider chart represents the allocated budget versus actual spending for a given organization.

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, but various heuristics, such as algorithms that plot data as the maximal total area, can be applied to sort the variables (axes) into relative positions that reveal distinct correlations, trade-offs, and a multitude of other comparative measures.

Radar charts are also known as web charts, spider charts, spider graphs, spider web charts, star charts, star plots, cobweb charts, irregular polygons, polar charts, and Kiviat diagrams. It is equivalent to a parallel coordinates plot, with the axes arranged radially.

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