A star plot is a radar chart that display multivariate data in a 2D chart or several quantitative variables that start from the same point. In this example you can see that there are four distinguishable spoke that is proportional to the magnitude of the variable it is representing. This gives it its star-like appearance, but the function of a map like this is handy when observers want to know where the clusters are, which is most similar or dissimilar points, and if there are any outliers. You can compare the red line with the blue to see how they compare and contrast.
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