[R] counting matched elements in two vectors

Jeff Newmiller jdnewmil at dcn.davis.CA.us
Fri Jan 24 01:36:43 CET 2014

Thank you for the reproducible example, but your description is missing a clear definition of what you want.

For example, if your desired output is 
result <- c(rep(0,16),2,1,0,3,1,1,0,1,0,0,0,0,0,0,1,3,2,0,0,1,rep(0,10))

then one answer might be


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M.Bezabih at lse.ac.uk wrote:
>   Hi all,
>I have the following reproducible example
>w<-c(11, 11, 12, 14, 14, 14, 15, 16, 18, 25, 26, 26, 26, 27, 27, 30)
> r<-z %in% w
>now r gives me the presence or absence of elements in z that are in w
>but I am interested in getting the number of times each element in z
>appears (or doesn't appear)  in w. I want the dimension of my resulting
>vector to be the same as that of z. How do I do that?
> Thanks in advance
> Mintewab
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