內的列我有一個大的數據集是這樣的:爲了每組
df <- data.frame(group = c(rep(1, 3), rep(5, 3)), member = c(30, 10, 22, 21, 44, 15))
group member
1 30
1 10
1 22
5 21
5 44
5 15
...
我想每個組內訂購會員。預期的輸出應該是這樣的:
group member
1 10
1 22
1 30
5 15
5 21
5 44
...
沒有人有實現這一想法?
多大實際數據集? – Arun