A$Session_id <- ave(rep(1,length(A$ID),A$ID,FUN=cumsum)
---
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try this:
> x <- read.table('clipboard')
> x
V1 V2
1 1 A
2 2 A
3 3 A
4 4 A
5 5 B
6 6 B
7 7 B
8 8 C
9 9 C
10 10 C
11 11 C
12 12 C
> x$ID <- ave(x$V1, x$V2, FUN = function(a)seq(length(a)))
> x
V1 V2 ID
1 1 A 1
2 2 A 2
3 3 A 3
4 4 A 4
5 5 B 1
6
Hi R Users
I am hoping someone might be able to give some pointers on alternative code to
the for loop described below.
I have a dataset which is ordered by subject ID and date, what I would like to
do is create a new variable that numbers the entries for each person (e.g.
1,2,3,)
As an e
3 matches
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