hablar 类型转换

library(hablar)

mtcars %>%
  convert(num(gear),
          chr(mpg),
          fct(cyl))


df <- data.frame(a = c("A", NA, "B", "C", "C"),
                 b = c(NA, 1, 1, 3, 3),
                 c = c(7, 8, 2, 3, 3),
                 stringsAsFactors = FALSE)
# Returns duplicated rows
df %>% find_duplicates()

df %>% find_duplicates(b:c)

df %>% find_na(b)