Top R&B artists of all time
DescriptionThis is a convenient wrapper that uses filter() and min_rank() to select the top or bottom entries in each group, ordered by wt. Examples# NOT RUN { df <- data.frame(x = c(10, 4, 1, 6, 3, 1, 1)) df %>% top_n(2) # Negative values select bottom from group. Note that we get more # than 2 values here because there's a tie: top_n() either takes # all rows with a value, or none. df %>% top_n(-2) if (require("Lahman")) { # Find 10 players with most games # A little nicer with %>% tbl_df(Batting) %>% group_by(playerID) %>% tally(G) %>% top_n(10) # Find year with most games for each player tbl_df(Batting) %>% group_by(playerID) %>% top_n(1, G) } # } |
