How can I use dplyr to apply a function to all non-group_by columns?

Question

I\'m trying to use the dplyr package to apply a function to all columns in a data.frame that are not being grouped, which I would do with aggregate():

Answer 1

This will get you almost all the way in dplyr.

h = iris %.%
  group_by(Species) %.%
  do(function(d){
    sapply(Filter(is.numeric, d), mean)  
  })

as.data.frame(h)