R data frame rank by groups (group by rank) with package dplyr

Question

I have a data frame \'test\' that look like this:

    session_id  seller_feedback_score
1   1   282470
2   1   275258
3   1   275258
4   1   275258
5   1   3         


        

Answer 1

Found an answer in : Add a "rank" column to a data frame

data.selected <- transform(data.selected, 
              seller_feedback_score_rank = ave(seller_feedback_score, session_id, 
                              FUN = function(x) rank(-x, ties.method = "first")))