Hello fellows,
I would like to create a sequence for repeated numbers in a dataset. For
example:
ID <- c(1:20)
grade <- c(4,4,4,5,5,7,7,7,7,8,8,8,9,9,9,9,9,10,10,10)
Data:
ID Grade
1 4
2 4
3 4
4 5
5 5
6 7
7 7
8 7
9 7
(...)
I would like to create a variable "sequence":
Data:
ID Grade Sequence:
1 4 1
2 4 2
3 4 3
4 5 1
5 5 2
6 7 1
7 7 2
8 7 3
9 7 4
Any help is very much appreciate!
Thank you,
Luana Marotta
[[alternative HTML version deleted]]
______________________________________________
[email protected] mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
