Create a ranking variable with dplyr?

Question

Suppose I have the following data

df = data.frame(name=c(\"A\", \"B\", \"C\", \"D\"), score = c(10, 10, 9, 8))

I want to add a new column w

Answer 1

It sounds like you're looking for dense_rank from "dplyr" -- but applied in a reverse order than what rank normally does.

Try this:

df %>% mutate(rank = dense_rank(desc(score)))
#   name score rank
# 1    A    10    1
# 2    B    10    1
# 3    C     9    2
# 4    D     8    3