mydata <- data.frame(id = c(rep(1, 3), rep(2, 3), rep(3, 3)),
score = c(c(1, 2, 3), c(3, 2, 1), c(1, 3, 2)),
location = c(rep(c("X", "Y", "Z"), 3)))
> mydata
id score location
1 1 1 X
2 1 2 Y
3 1 3 Z
4 2 3 X
5 2 2 Y
6 2 1 Z
7 3 1 X
8 3 3 Y
9 3 2 Z
I would like to sort my data.frame according to score
from smallest to largest for each id
.
Simplying ordering by score
ignores the id
column.
> mydata[with(mydata, order(score)),]
id score location
1 1 1 X
6 2 1 Z
7 3 1 X
2 1 2 Y
5 2 2 Y
9 3 2 Z
3 1 3 Z
4 2 3 X
8 3 3 Y
Essentially, I want my output to be
id score location
1 1 1 X
2 1 2 Y
3 1 3 Z
4 2 1 Z
5 2 2 Y
6 2 3 X
7 3 1 X
8 3 2 Z
9 3 3 Y