page_title: Radar chart
section_title: Example
hierarchical_section_title: Radar chart / Example
context_page_description: 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 into relative positions that reveal distinct correlations, trade-offs, and a multitude of other comparative measures.
  The radar chart is also known as web chart, spider chart, spider web chart, star chart, star plot, cobweb chart, irregular polygon, polar chart, or Kiviat diagram. It is equivalent to a parallel coordinates plot, with the axes arranged radially.
context_section_description: The chart on the right  contains the star plots of 15 cars. The variable list for the sample star plot is:
  Price
  Mileage (MPG)
  1978 Repair Record (1 = Worst, 5 = Best)
  1977 Repair Record (1 = Worst, 5 = Best)
  Headroom
  Rear Seat Room
  Trunk Space
  Weight
  Length
  We can look at these plots individually or we can use them to identify clusters of cars with similar features. For example, we can look at the star plot of the Cadillac Seville (the last one on the image) and see that it is one of the most expensive cars, gets below average (but not among the worst) gas mileage, has an average repair record, and has average-to-above-average roominess and size. We can then compare the Cadillac models (the last three plots) with the AMC models (the first three plots). This comparison shows distinct patterns. The AMC models tend to be inexpensive, have below average gas mileage, and are small in both height and weight and in roominess. The Cadillac models are expensive, have poor gas mileage, and are large in both size and roominess.
caption: Detail for the star plot of the Cadillac Seville.