Using R and RStudio for Data Management, Statistical Analysis, and Graphics, 2nd Edition

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“K23166” — 2015/1/28 — 9:35 — page 51 — #77

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Chapter 5

Common statistical procedures

This chapter describes how to generate univariate summary statistics (such as means, vari-

ances, and quantiles) for continuous variables, display and analyze frequency tables and

cross-tabulations of categorical variables, and carry out a variety of one- and two-sample

procedures.

5.1 Summary statistics

5.1.1 Means and other summary statistics

Example: 5.7.1

mean(x)

or

library(mosaic)

favstats(x, data=ds)

Note: The mean() function accepts a numeric vector or a numeric dataframe as arguments

(date objects are also supported). Similar functions include median() (see ...