Tidyverse selections implement a dialect of R where operators make it easy to select variables:
: for selecting a range of consecutive variables.
! for taking the complement of a set of variables.
amp ...……
par(ask=TRUE)
opar amp;amp;lt;- par(no.readonly=TRUE) # record current settings
# Listing 11.1 - A scatter plot with best fit lines
attach(mtcars) ...……