Visualizing Categorical Data: Data, Stories, and Pictures

Visualizing Categorical data : data , stories , andPicturesMichael FriendlyYork data frequency data , and discrete data are most of-ten presented in tables, and analyses using loglinear models andlogistic regression are most often presented in terms of parame-ter estimates. Over the past decade, I and others have developednovel visualization methods for Categorical data , designed to pro-vide exploratory and confirmatory graphic displays analogous tothose used readily and easily for quantitative data . These graphicalmethods are described inVisualizing Categorical data . The bookalso provides a large collection of macros designed to make thesemethods readily and easily used. This paper provides an overviewof these graphical methods and macros, as told through data , theirstories, and associated graphical : Categorical data , graphics, mosaic displays, mo-saic matrices, correspondence analysis, loglinear models, IntroductionOver the last decade a modest revolution has been brewing in theanalysis of Categorical data , as graphical methods and techniquesof data vi

Visualizing Categorical Data: Data, Stories, and Pictures Michael Friendly York University, friendly@yorku.ca Abstract Categorical data—frequency data, and discrete data—are most of-

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  Data, Stories, Categorical, Visualizing, Categorical data, Visualizing categorical data

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