list all factor levels of a data.frame

Question

with str(data) I get the headof the levels (1-2 values)

fac1: Factor w/ 2  levels ... :
fac2: Factor w/ 5  levels ... :
fac3: Facto         


        

Answer 1

Or using purrr:

data %>% purrr:map(levels)

Or to first factorize everything:

data %>% dplyr::mutate_all(as.factor) %>% purrr:map(levels)

And answering the question about how to get the lengths:

data %>% map(levels) %>% map(length)