[R] counting entries in vector

axionator axionator at gmail.com
Wed Feb 4 16:19:31 CET 2009

Hi all,
I've a vector with entries, which are all of the same type, e.g. string:
k <- c("bb", "bb", "bb", "aa", "cc", "cc")
and want to create a second vector containing the number of each entry
in k in the same order as in k, i.e.
c(3, 1, 2)

k <- c(5,5,5,5,2,2,4)
=> c(4,2,1)


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