dplyr to output class data.frame

Question

I can summarise a data frame with dplyr like this:

mtcars %>%
group_by(cyl) %>%
summarise(mean(mpg))

To convert the output b

Answer 1

In addition to what G. Grothendieck mentioned above, you can convert it into a new dataframe:

new_summary <- mtcars %>%
   group_by(cyl) %>%
   summarise(mean(mpg)) %>%
   as.data.frame()