How do I create binned factor variables from a continuous variable, with custom breaks?

Question

I have a vector that looks like this:

dataset <- c(4,7,9,1,10,15,18,19,3,16,10,16,12,22,2,23,16,17)

I would like to create four dummy c

Answer 1

Use cut:

data.frame(dataset, bin=cut(dataset, c(1,4,9,17,23), include.lowest=TRUE))