library("ggplot2")
p <- ggplot(mtcars, aes(x = wt, y = mpg)) +
  geom_point() +
  scale_x_continuous(breaks = extended_range_breaks()(mtcars$wt)) +
  scale_y_continuous(breaks = extended_range_breaks()(mtcars$mpg)) +
  ggtitle("Cars")
p + geom_rangeframe() +
  coord_cartesian(clip="off") +
  theme_tufte()
p + geom_rug() +
 theme_tufte(ticks = FALSE)
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