Improving the Display of Correspondence Analysis Using Moon Plots

Abstract

Standard correspondence analysis plots are readily misinterpreted by research users. This paper presents a new plot, called the moon plot, which is less susceptible to misinterpretation. Row points are plotted in the traditional way. Column points are plotted equidistant from the origin, with their directions from the origin as in traditional correspondence analysis plots, and the information traditionally communicated by the distance of the points to the origin instead communicated by the size of the fonts of the labels.