find the ranks of elements in a vector from another longer vector in R
Question
Suppose I have a short vector v1=c(1,3,4,7,9) and another short vector v2=c(3,4,10,12,9) . The combined "long" vector is v=c(1,3,3,4,4,7,9,9,10,12) . Now I want to find the rank of each of the elements in v1 (ie 1,3,4,7,9) in the long vector v . How can I efficiently do that in R? Thanks!
1 answers
solution1
0 ACCPTED 2013-10-29 05:00:40
How about this?
sapply(v1,function(x) mean(which(x==v)))
# [1] 1.0 2.5 4.5 6.0 7.5
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