R: Ordering rows -

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• how sort dataframe column(s)? 15 answers

i trying order rows variable. have created sample data frame below , tried order rows ordering not appear work.

# create vectors data frame score <- rep(seq(1:3), 2) id <- rep(c(2014, 2015), each = 3) var_if_1 <- rep(c(0.1, 0.8), each = 3) var_if_2 <- rep(c(0.9, 0.7), each = 3) var_if_3 <- rep(c(0.6, 0.2), each = 3)  # generate , print data frame of raw data foo <- data.frame(score, id, var_if_1, var_if_2, var_if_3) foo  # impose arbitrary ordering bar <- foo[sample(1:nrow(foo)), ] bar  # order rows increasing on 'score' bar[order(score), ] 

what doing wrong doesn't oder rows on score?

you should use

bar[order(bar$score), ] 

otherwise, you're ordering on base of variable "score" instead of column.