Convert multiple character columns to as.Date and time in R

Question

We have an arbitrary dataset, called df:

enter <- c("2017-01-01", "2018-02-02", "2018-03-03") 
guest <- c("Foxtrot&qu         


        

Answer 1

You just need to tweak the arguments of mutate_at. Any additional arguments to as.Date are specified as arguments to mutate_at.

df2 <- df %>% mutate_at(vars(enter,disposal,date), as.Date, format="%Y-%m-%d")

The second part of your question has a similar solution.

df2 <- df2 %>% mutate_at(vars(clock, rolex), function(x) chron(times. = x))