Select (dplyr) operator with '-'

Question

How to use SELECT (dplyr library) operator with name containing '-'? For example:

AdultUCI %>% select(capital-gain) 

caused:

Answer 1

Try this

data.frame(`a-b` = 1, c = 2, check.names = FALSE) %>% 
  select(`a-b`)
#   a-b
# 1   1