R：更改列重复的名称

Question

我在一列中有一个包含许多重复值的数据集：

A
A
A
A
B
B
B
B

...  我怎样才能改变它：

A1
A2
A3
A4
B1
B2
B3
B4
…

由于

Answer 1

您可以使用?ave和?seq_along：

b <- c("A","A","A","A","B","B","B","B","A","C")

ave(b, b, FUN=function(x)paste0(x, seq_along(x)))
# [1] "A1" "A2" "A3" "A4" "B1" "B2" "B3" "B4" "A5" "C1"