Hi,
Is there a simple way of doing the following in R?
a <- data.frame(name = c(rep("A", 3), rep("B", 5), rep("C", 10)))
> a
name
1 A
2 A
3 A
4 B
5 B
6 B
7 B
8 B
9 C
10 C
11 C
12 C
13 C
14 C
15 C
16 C
17 C
18 C
Do some fancy R code here:
> a
name val
1 A 1
2 A 2
3 A 3
4 B 1
5 B 2
6 B 3
7 B 4
8 B 5
9 C 1
10 C 2
11 C 3
12 C 4
13 C 5
14 C 6
15 C 7
16 C 8
17 C 9
18 C 10
--
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