Star plots allow you to compare multiple variables for each observation, as variables are plotted on a radii, lines coming out of the center of the plot, with each star representing a single observation.The star plot consists of a sequence of equi-angular spokes, called the radii, with each spoke representing one of the variables. The data length of a spoke is proportional to the magnitude of the variable for the data point relative to the maximum magnitude of the variable across all the data points. A line is then drawn to connect the data values for each spoke, which gives the plot it's star-like appearance. The above image is a star plot of crime rates in US cities, and represents multivariate data with vertices at equally spaced intervals and distance from center proportional to the variable's value.
No comments:
Post a Comment