On Jan 21, 2010, at 1:18 AM, Carrie Li wrote:
Dear R-helpers,
I have a question about giving index.
Suppose that I have a vector say, id=1:5, and each of them have some
given
index but some of them may share the same index
Now, I have another vector, and I want to give it a index based what
just
defined.
# 5 subjects
test1=1:5
# corresponding index, so here, subject 2 and subject 4 share the
common
index "1"
index=c(3,1,2,1,4)
# now I have another vector, and I want to use the index defined above
test2=c(5,4,2,1,1,5,3)
## so, the result should be something like this--index of test2 is
(4,1,1,3,3,4,2)
> index[test2]
[1] 4 1 1 3 3 4 2
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
______________________________________________
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.
