Data Science Desktop Survival Guide by Graham Williams
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Exposition Pipe

REVIEW We also see here yet another useful pipe operation %$%. This is the exposition pipe which is also useful for commands that do not take a dataset as their argument but instead some columns from the dataset. It evaluates the following function within the context of the dataset passed to it, so that the variables of the dataset become available without the need to quote them

ds %>%
  filter(rainfall==0) %$%
  cor(min_temp, max_temp)

## [1] NA

We might otherwise use with.

ds %>%
  filter(rainfall==0) %>%
  with(cor(min_temp, max_temp))

## [1] NA