Sort data frame column by factor

Question

Supose I have a data frame with 3 columns (name, y, sex) where name is character, y is a numeric value and <

Answer 1

order takes multiple arguments, and it does just what you want:

with(score, score[order(sex, y, x),])
##         x        y sex
## 3   SUSAN 6.636370   F
## 5    EMMA 6.873445   F
## 9  VIOLET 8.539329   F
## 6 LEONARD 6.082038   M
## 2     TOM 7.812380   M
## 8    MATT 8.248374   M
## 4   LARRY 8.424665   M
## 7     TIM 8.754023   M
## 1    MARK 8.956372   M