5118 - Visualizing America: SAS® Graphical Depictions Utilizing the American Community Survey

SAS provides an array of powerful tools to analytically examine—and graphically depict—large-scale data sets. This project explored the PROC FREQ functionality to produce mosaic plots for categorical data. Mosaic plots, as described by Hartigan and Kleiner (1981), are formed when numbers in a contingency table are represented by rectangles of areas proportional to the numbers, with shape and position rendered to expose deviations from independence models. The resulting visual depiction (a collection of rectangles for the contingency table) is called a mosaic (Hartigan and Kleiner 1981; Friendly 2001). The colors and patterns displayed within the mosaic plots illustrate and define the relationships displayed by the categorical variable values. The American Community Survey (ACS) is conducted annually by the United States Census Bureau. The four major survey sections of the ACS consist of social, housing, economic, and demographic data. Within these four sections, the ACS yields rich, personal data covering more than 40 topic areas, such as educational level of attainment, commute time to work, type of housing, and ethnicity. By combining SAS® functionality with varying combinations of categorical information from a large-scale, national data set, mosaic plots were generated to create a visual portrait-in-time of the ACS respondents. This work thus provides a contemporary window into the daily lives of millions of Americans across our country.

Presenter - Wendy Dickinson

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