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#  Chapter 4: Making Comparisons
library(poliscidata)   # Loads R companion package in session

# CROSS-TABULATIONS AND MOSAIC PLOTS
# this example applies some labels to mosiac plot

cat("Cross Tabulation:\n")
xtp(nes, envjob_3, pid_3, wt, 
    ylab="Environ vs. Jobs", 
    xlab="Party Identification", 
    main="Environmental Opinions, by Party Identification")
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From Ed Boone (5:06).
 Correlation Tutorial
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From Roger Peng (9:47).
 The ggplot2 Plotting System, Part 2a
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