ranking column in r without skipping ties

Question

I want to rank a column with ties, but not skip the next number if there are ties. currently when I do:

A         B
group1   325
group1   325
group1   123 

C <- df %>% 
  group_by(A) %>%
  mutate(rank(-B, ties.method = "min")) %>%
  ungroup()

I get

A         B   C
group1   325  1
group1   325  1
group1   123  3

Is there a way to make it not skip the number 2?

user_3732271 · Answer

We can use dense_rank

library(dplyr)
df %>% 
   group_by(A) %>%
   mutate(C = dense_rank(-B)) %>%
   ungroup

-output

# A tibble: 3 × 3
  A          B     C
     
1 group1   325     1
2 group1   325     1
3 group1   123     2

df <- structure(list(A = c("group1", "group1", "group1"), B = c(325L, 
325L, 123L)), class = "data.frame", row.names = c(NA, -3L))