Hi, R experts:
I am asking for helps with manipulating this data: we have different groups:
A,B, C, and so on. In each group, we have different students, for example,
we have 6 students in A and 5 students in B. Each student gives a rating,
which ranges from 1 to 3.
We want to manipulate this data and add three more variables called as 1, as
2 and as 3. For example, in group A, for each student, we count the #
of student before this student provides rating as 1, rating as 2 and rating
as 3. For example, for student 2 in group A, there are 0 students before
him/her provide rating as 1, there are 0 students before him/her provide
rating as 2, there are 1 students before him/her provide rating as 3. For
student 3 in group A, there are 0 students before him/her provide rating as
1, there are 1 students before him/her provide rating as 2, there are 1
students before him/her provide rating as 3.
group student rating as 1 as 2 as 3
A 1 3 -- -- --
A 2 2 0 0 1
A 3 2 0 1 1
A 4 3 0 2 1
A 5 1 0 2 2
A 6 2 1 2 2
A 7 3 1 3 2
B 1 2 -- -- --
B 2 3 0 1 0
B 3 3 0 1 1
B 4 1 0 1 2
B 5 1 1 1 2
Best
Jay
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org 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.
