pass grouped dataframe to own function in dplyr

Question

I am trying to transfer from plyr to dplyr. However, I still can\'t seem to figure out how to call on own functions in a chained dplyr function.

I have a data frame

Answer 1

For those who get here from google. Let's say you wrote your own print function.

printFunction <- function(dat) print(dat)
df <- data.frame(a = 1:6, b = 1:2)

As it was asked here

df %>% 
    group_by(b) %>% 
    printFunction(.)

prints entire data. To get dplyr print multiple tables grouped by, you should use do

df %>% 
    group_by(b) %>% 
    do(printFunction(.))